Patents-Review.com
ClassID:

107276 ⎘

C10M2215/28 - CPC Classification

Classification description:

Organic compounds containing nitrogen as ingredients in lubricant compositions Amides; Imides

Sub-classes:
Recent Application in this class:
#1
20260117143
2026-04-30

LUBRICATING AND COOLING FLUID FOR AN ELECTRIC MOTOR SYSTEM HAVING AN AUXILIARY FLUID PUMPING SYSTEM

 #2
20260109911
2026-04-23

FRICTION MODIFIER FOR WET CLUTCH

 #3
20250270465
2025-08-28

DIESEL ENGINE LUBRICATING COMPOSITIONS AND METHODS OF USE THEREOF

 #4
20250122443
2025-04-17

ENVIRONMENTALLY ACCEPTABLE LUBRICANT COMPOSITIONS

 #5
20250115825
2025-04-10

LUBRICATING OIL COMPOSITIONS

 #6
20250066684
2025-02-27

FABRICATION FLUIDS

 #7
20250011674
2025-01-09

SUSTAINABLE LUBRICANTS

 #8
20250002802
2025-01-02

LUBRICANT BASE OIL

 #9
20240343990
2024-10-17

LUBRICATING OIL COMPOSITION FOR INTERNAL COMBUSTION ENGINE

 #10
20240336865
2024-10-10

Additive mixture

 #11
20240318094
2024-09-26

LUBRICANT COMPOSITION

 #12
20240209277
2024-06-27

DETERGENT- FREE AND LOW- ASH LUBRICATING COMPOSITION

 #13
20240199971
2024-06-20

Lubricating oil composition

 #14
20240174942
2024-05-30

GREASE COMPOSITION

 #15
20240166968
2024-05-23

ONE-STEP PRETREATMENT METHOD OF METALLIC SUBSTRATES AT NON-NEUTRAL PH VALUES FOR METAL COLD FORMING

 #16
20240026243
2024-01-25

TRANSMISSION LUBRICANTS CONTAINING MOLYBDENUM

 #17
20240018441
2024-01-18

LUBRICATING OIL COMPOSITIONS

 #18
20230348809
2023-11-02

Lubricant Compositions For Direct Injection Engines

 #19
20230332065
2023-10-19

LUBRICATING COMPOSITION AND METHOD OF LUBRICATING AN INTERNAL COMBUSTION ENGINE

 #20
20230323236
2023-10-12

Succinimide dispersants post-treated with heteroaromatic glycidyl ethers that exhibit good soot handling performance

 #21
20230287292
2023-09-14

Engine oil composition

 #22
20230279308
2023-09-07

GREASE COMPOSITION

 #23
20230257672
2023-08-17

SUCCINIMIDE DISPERSANTS POST-TREATED WITH AROMATIC GLYCIDYL ETHERS THAT EXHIBIT GOOD SOOT HANDLING PERFORMANCE

 #24
20230220295
2023-07-13

Low viscosity functional fluid composition

 #25
20230212476
2023-07-06

LUBRICATING COMPOSITIONS AND METHODS OF OPERATING AN INTERNAL COMBUSTION ENGINE

 #26
20230183597
2023-06-15

Lubricant compositions for direct injection engine

 #27
20230124121
2023-04-20

Grease composition

 #28
20230049828
2023-02-16

GREASE COMPOSITION

 #29
20230002699
2023-01-05

CONTINUOUS ACOUSTIC MIXING FOR PERFORMANCE ADDITIVES AND COMPOSITIONS INCLUDING THE SAME

 #30
20220411712
2022-12-29

LUBRICANT COMPOSITION FOR PREVENTING CORROSION AND/OR TRIBO-CORROSION OF METAL PARTS IN AN ENGINE

 #31
20220403284
2022-12-22

Lubricating compositions and methods of operating an internal combustion engine

 #32
20220403283
2022-12-22

MARINE DIESEL CYLINDER LUBRICANT OIL COMPOSITIONS

 #33
20220389347
2022-12-08

Composite material

 #34
20220364012
2022-11-17

Grease composition

 #35
20220364011
2022-11-17

Use of a triazole compound as an additive for improving the anti-corrosion properties of a lubricant composition for a propulsion system of an electric or hybrid vehicle

 #36
20220348839
2022-11-03

Grease composition and rolling bearing

 #37
20220275303
2022-09-01

Lubricating oil composition

 #38
20220220410
2022-07-14

ASHLESS ADDITIVE COMPOSITION

 #39
20220213403
2022-07-07

Preservative composition

 #40
20220186137
2022-06-16

Lubricating oil composition

 #41
20220177805
2022-06-09

Marine diesel lubricant oil compositions

 #42
20220177802
2022-06-09

Marine diesel lubricant oil compositions having improved low temperature performance

 #43
20220145203
2022-05-12

Grease composition, and lubrication method and device for sliding mechanism, using said grease composition

 #44
20220135899
2022-05-05

Lubricating Composition

 #45
20220135898
2022-05-05

Lubricant Compositions For Direct Injection Engines

 #46
20210363451
2021-11-25

Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants

 #47
20210301218
2021-09-30

LUBRICANT COMPOSITIONS FOR DIRECT INJECTION ENGINES

 #48
20210230497
2021-07-29

Zinc-free lubricating composition

 #49
20210214639
2021-07-15

Low molecular weight amide/ester containing quaternary ammonium salts

 #50
20210214637
2021-07-15

Lubricant composition

 #51
20210207051
2021-07-08

Low molecular weight imide containing quaternary ammonium salts

 #52
20210189279
2021-06-24

LUBRICATING COMPOSITION CONTAINING AN OXYALKYLATED HYDROCARBYL PHENOL

 #53
20210189030
2021-06-24

Polyolefin dispersants and methods of making and using thereof

 #54
20210139806
2021-05-13

LESS CORROSIVE ORGANIC COMPOUNDS AS LUBRICANT ADDITIVES

 #55
20210122994
2021-04-29

Synergistic lubricants with reduced electrical conductivity

 #56
20210087493
2021-03-25

Method Of Lubricating An Internal Combustion Engine

 #57
20210040413
2021-02-11

Grease composition

 #58
20210040412
2021-02-11

Nitrogen-free phosphorus compounds and lubricants containing the same

 #59
20210032525
2021-02-04

Spacer fluids and cement slurries that include surfactants

 #60
20210009918
2021-01-14

Dispersing agent for lubricating oil, method for producing same, and lubricating oil composition

 #61
20210002577
2021-01-07

LUBRICANT COMPOSITIONS FOR HIGH EFFICIENCY ENGINES

 #62
20200407621
2020-12-31

EMULSIFIED DRILLING FLUIDS AND METHODS OF MAKING AND USE THEREOF

 #63
20200399556
2020-12-24

Lubricant compositions for direct injection engine

 #64
20200399555
2020-12-24

Lubricant compositions for direct injection engine

 #65
20200392406
2020-12-17

Macromolecular antioxidants based on dual type moiety per molecule: structures, methods of making and using the same

 #66
20200362264
2020-11-19

Additive and lubricant for industrial lubrication

 #67
20200362261
2020-11-19

Less corrosive organic compounds as lubricant additives

 #68
20200291285
2020-09-17

Development of retarded acid system

 #69
20200255755
2020-08-13

Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants

 #70
20200248061
2020-08-06

Lubricants for water-based drilling fluids

 #71
20200239804
2020-07-30

Seal swell agents for lubricating compositions

 #72
20200239501
2020-07-30

PHOSPHOROUS CONTAINING ANTIWEAR ADDITIVES

 #73
20200231892
2020-07-23

Engine oils for soot handling and friction reduction

 #74
20200231891
2020-07-23

Alkylphenol detergents

 #75
20200181529
2020-06-11

LUBRICATING OIL COMPOSITION

 #76
20200165536
2020-05-28

Lubricating Oil Compositions

 #77
20200165504
2020-05-28

Spacer fluid compositions that include surfactants

 #78
20200148969
2020-05-14

Lubricating oil additives

 #79
20200140739
2020-05-07

Methods of using drilling fluid compositions with enhanced rheology

 #80
20200123463
2020-04-23

Composition containing heterocyclic compounds and a method of lubricating an internal combustion engine

 #81
20200095491
2020-03-26

Development of anti-bit balling fluids

 #82
20200087560
2020-03-19

Emulsifier compositions for invert emulsion fluids and methods of using the same

 #83
20200071634
2020-03-05

LUBRICATING OIL COMPOSITION

 #84
20200040247
2020-02-06

Development of anti-bit balling fluids

 #85
20200032159
2020-01-30

LUBRICATING OIL COMPOSITION

 #86
20200032158
2020-01-30

LUBRICATING OIL COMPOSITIONS WITH ENGINE CORROSION PROTECTION

 #87
20190367828
2019-12-05

Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants

 #88
20190352577
2019-11-21

ENGINE LUBRICANT CONTAINING POLYETHER COMPOUNDS

 #89
20190345406
2019-11-14

LOW MOLECULAR WEIGHT AMIDE/ESTER CONTAINING QUATERNARY AMMONIUM SALTS

 #90
20190330555
2019-10-31

LUBRICANTS FOR USE IN BOOSTED ENGINES

 #91
20190322958
2019-10-24

Lubricant Composition

 #92
20190316058
2019-10-17

Lubricating oil composition, lubrication method, and transmission

 #93
20190316057
2019-10-17

Lubricating composition containing an oxyalkylated hydrocarbyl phenol

 #94
20190316053
2019-10-17

Use of specific derivatives of quaternized nitrogen compounds as additives in fuels and lubricants

 #95
20190309210
2019-10-10

Development of anti-bit balling fluids

 #96
20190292483
2019-09-26

Aliphatic tetrahedral borate compounds for fully formulated lubricating compositions

 #97
20190292479
2019-09-26

Seal swell agents for lubricating compositions

 #98
20190292473
2019-09-26

COMPOSITION AND METHOD FOR PREVENTING OR REDUCING LOW SPEED PRE-IGNITION IN SPARK-IGNITED INTERNAL COMBUSTION ENGINES

 #99
20190292454
2019-09-26

Macromolecular antioxidants based on dual type moiety per molecule: structures, methods of making and using the same

 #100
20190292432
2019-09-26

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #101
20190292431
2019-09-26

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #102
20190284501
2019-09-19

LUBRICATING OIL COMPOSITION CONTAINING AN ANTIFOAMING AGENT

 #103
20190284496
2019-09-19

Lubricants containing amine salt of acid phosphate and hydrocarbyl borate

 #104
20190284495
2019-09-19

Nitrogen-free phosphorus compounds and lubricants containing the same

 #105
20190284314
2019-09-19

Polyolefin dispersants and methods of making and using thereof

 #106
20190264129
2019-08-29

Lubricating oil composition for refrigerator, composition for refrigerator, lubricating method, and refrigerator

 #107
20190264123
2019-08-29

Aliphatic tetrahedral borate compounds for lubricating compositions

 #108
20190264119
2019-08-29

ACID-FREE QUATERNIZED NITROGEN COMPOUNDS AND USE THEREOF AS ADDITIVES IN FUELS AND LUBRICANTS

 #109
20190256792
2019-08-22

Lubricating oils for automatic transmissions

 #110
20190256791
2019-08-22

MARINE DIESEL LUBRICANT OIL COMPOSITIONS

 #111
20190249105
2019-08-15

Total base number boosters for marine diesel engine lubricating compositions

 #112
20190241829
2019-08-08

LUBRICATING COMPOSITION COMPRISING SULFONATE DETERGENT AND ASHLESS HYDROCARBYL PHENOLIC COMPOUND

 #113
20190241825
2019-08-08

Alkyl phosphate amine salts for use in lubricants

 #114
20190241824
2019-08-08

Alkyl phosphate amine salts for use in lubricants

 #115
20190233708
2019-08-01

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #116
20190233707
2019-08-01

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #117
20190225911
2019-07-25

Zinc-free lubricating composition

 #118
20190225909
2019-07-25

Ultra low ash lubricating oil compositions

 #119
20190218471
2019-07-18

Corrosion inhibitors for fuels and lubricants

 #120
20190211280
2019-07-11

LUBRICATING OIL COMPOSITIONS CONTAINING AMINE COMPOUNDS HAVING IMPROVED SEAL PERFORMANCE

 #121
20190203152
2019-07-04

Lubricant composition for a gas engine

 #122
20190203145
2019-07-04

TITANIUM AND MOLYBDENUM COMPOUNDS AND COMPLEXES AS ADDITIVES IN LUBRICANTS

 #123
20190203096
2019-07-04

Cement slurries, cured cements and methods of making and use thereof

 #124
20190203095
2019-07-04

Cement slurries, cured cements and methods of making and use thereof

 #125
20190185779
2019-06-20

Manufacturing method of lubricant composition and lubricant composition

 #126
20190185778
2019-06-20

LUBRICANT COMPOSITIONS FOR DIRECT INJECTION ENGINES

 #127
20190177638
2019-06-13

Automotive transmission fluid compositions for improved energy efficiency

 #128
20190177636
2019-06-13

ALKYLPHENOL DETERGENTS

 #129
20190169528
2019-06-06

Marine engine lubrication

 #130
20190169526
2019-06-06

LUBRICANT COMPOSITION FOR GASOLINE ENGINE AND METHOD FOR PRODUCING SAME

 #131
20190169525
2019-06-06

GASOLINE ENGINE LUBRICANT OIL COMPOSITION AND MANUFACTURING METHOD THEREFOR

 #132
20190169514
2019-06-06

Amine alkenyl substituted succinimide reaction product fuel additives, compositions, and methods

 #133
20190153349
2019-05-23

Mercaptoazole derivatives as lubricating additives

 #134
20190144775
2019-05-16

Lubricant compositions for direct injection engines

 #135
20190127655
2019-05-02

LUBRICATING OIL COMPOSITIONS HAVING IMPROVED CLEANLINESS AND WEAR PERFORMANCE

 #136
20190127654
2019-05-02

Lubricating oil compositions with engine wear protection

 #137
20190119597
2019-04-25

Lubricant oil composition and lubrication method

 #138
20190106650
2019-04-11

Synergistic dispersants

 #139
20190106645
2019-04-11

Mineral oil-based base oil, lubricating oil composition, equipment, lubricating method, and grease composition

 #140
20190100715
2019-04-04

Emulsions having oil phase surfactants and water phase additive blends

 #141
20190093042
2019-03-28

Surface protection composition and terminal fitted electric wire

 #142
20190085258
2019-03-21

Lubricating oil composition, lubricating method, and transmission

 #143
20190085129
2019-03-21

Polyimide dispersants and methods of making and using thereof

 #144
20190078035
2019-03-14

Lubricant with high pyrophosphate level

 #145
20190078034
2019-03-14

Lubricant composition containing an antiwear agent

 #146
20190078033
2019-03-14

Method for preventing or reducing low speed pre-ignition in direct injected spark-ignited engines with cobalt-containing lubricant

 #147
20190071616
2019-03-07

Polyalkylene glycol-based lubricant composition

 #148
20190031973
2019-01-31

Lubricating oil composition

 #149
20190031969
2019-01-31

Quaternized nitrogen compounds and use thereof as additives in fuels and lubricants

 #150
20190024006
2019-01-24

Foreign substance removing lubricant composition, foreign substance removing lubricant composition applied member, and method for using foreign substance removing lubricant composition

 #151
20190010418
2019-01-10

Long duration fuel economy lubricating composition

 #152
20190002794
2019-01-03

Mineral base oil, lubricant composition, internal combustion engine, lubricating method of internal combustion engine

 #153
20190002789
2019-01-03

LUBRICATING ENGINE OIL COMPOSITIONS CONTAINING DETERGENT COMPOUNDS

 #154
20190002788
2019-01-03

Marine diesel lubricant oil compositions

 #155
20180371351
2018-12-27

Protected mercaptophenols and thiophenols for lubricating compositions

 #156
20180370998
2018-12-27

Aminobisphosphonate antiwear additives

 #157
20180346842
2018-12-06

Cylinder lubricating oil composition for crosshead diesel engine

 #158
20180334635
2018-11-22

Dispersants, method of making, and using same

 #159
20180327687
2018-11-15

Poly (meth)acrylate with improved viscosity index for lubricant additive application

 #160
20180320063
2018-11-08

Development of retarded acid system

 #161
20180320050
2018-11-08

Methods of using drilling fluid compositions with enhanced rheology

 #162
20180312439
2018-11-01

Dispersant in cement formulations for oil and gas wells

 #163
20180305632
2018-10-25

Lubricating composition containing an antiwear agent

 #164
20180291306
2018-10-11

Metal working fluid

 #165
20180282654
2018-10-04

Mixed phosphorus esters for lubricant applications

 #166
20180282216
2018-10-04

Dispersant in cement formulations for oil and gas wells

 #167
20180251700
2018-09-06

Lubricating oil compositions

 #168
20180251696
2018-09-06

Lubricating oil compositions containing amine compounds having improved seal performance

 #169
20180245014
2018-08-30

Viscosity index improver, lubricant composition, and method for manufacturing lubricant composition

 #170
20180245012
2018-08-30

Azole derivatives as lubricating additives

 #171
20180237722
2018-08-23

Lubricating oil compositions and methods of use thereof

 #172
20180237718
2018-08-23

Relating to lubricating compositions

 #173
20180237717
2018-08-23

Azole derivatives as lubricating additives

 #174
20180237716
2018-08-23

Lubricating oil compositions containing borated dispersants and amine compounds and methods of making and using same

 #175
20180237715
2018-08-23

Composition containing heterocyclic compounds and a method of lubricating an internal combustion engine

 #176
20180230396
2018-08-16

Grease composition and grease-sealed roller bearing

 #177
20180223216
2018-08-09

Lubricating composition with seals compatibility

 #178
20180223214
2018-08-09

Seal swell agents for lubrication compositions

 #179
20180223175
2018-08-09

Retarded acid systems, emulsions, and methods for using in acidizing carbonate formations

 #180
20180223169
2018-08-09

Spacer fluid compositions that include surfactants

 #181
20180223168
2018-08-09

Spacer fluids and cement slurries that include surfactants

 #182
20180223167
2018-08-09

Spacer fluid compositions, methods, and systems for aqueous based drilling mud removal

 #183
20180223166
2018-08-09

Invert emulsion based drilling fluid and methods of using same

 #184
20180223165
2018-08-09

Emulsifier compositions for invert emulsion fluids and methods of using the same

 #185
20180223162
2018-08-09

Development of anti-bit balling fluids

 #186
20180223161
2018-08-09

Development of anti-bit balling fluids

 #187
20180223160
2018-08-09

Anti-bit balling drilling fluids, and methods of making and use thereof

 #188
20180223158
2018-08-09

Drilling fluid compositions with enhanced rheology and methods of using same

 #189
20180223156
2018-08-09

Enhanced filtration control packages, wellbore servicing fluids utilizing the same, and methods of maintaining the structure of a wellbore

 #190
20180223153
2018-08-09

Lubricants for water-based drilling fluids

 #191
20180222797
2018-08-09

Cement slurries, cured cement and methods of making and use thereof

 #192
20180222796
2018-08-09

Cement slurries, cured cements and methods of making and use thereof

 #193
20180216025
2018-08-02

Grease composition for rolling bearings and rolling bearing

 #194
20180201862
2018-07-19

Zinc-free lubricating composition

 #195
20180201859
2018-07-19

Lubricants with calcium-containing detergents and their use for improving low-speed pre-ignition

 #196
20180201857
2018-07-19

Acid-free quaternized nitrogen compounds and use thereof as additives in fuels and lubricants

 #197
20180201856
2018-07-19

Quaternized nitrogen compounds and use thereof as additives in fuels and lubricants

 #198
20180187119
2018-07-05

STEEL WIRE ROD HAVING COATING FILM THAT HAS EXCELLENT CORROSION RESISTANCE AND WORKABILITY, AND METHOD FOR PRODUCING SAME

 #199
20180163153
2018-06-14

Polyolefin-derived dispersants

 #200
20180148661
2018-05-31

Axle oil composition having enhanced fuel efficiency and low viscosity

 #201
20180142181
2018-05-24

Thiadiazole components, compositions, and methods

 #202
20180134983
2018-05-17

Ultra-fluid lubricating composition

 #203
20180134982
2018-05-17

Ashless or reduced ash quaternary detergents

 #204
20180134981
2018-05-17

Lubricant composition comprising hindered cyclic amines

 #205
20180134980
2018-05-17

Lubricating oil additives

 #206
20180119049
2018-05-03

Lubricant composition

 #207
20180119048
2018-05-03

Method for improving engine fuel efficiency

 #208
20180119041
2018-05-03

Acid-free quaternized nitrogen compounds and use thereof as additives in fuels and lubricants

 #209
20180112150
2018-04-26

Lubricating oil composition for gear oil

 #210
20180112146
2018-04-26

Lubricating oil compositions comprising a biodiesel fuel and a Mannich condensation product

 #211
20180112145
2018-04-26

Lubricating oil compositions comprising a biodiesel fuel and a dispersant

 #212
20180111912
2018-04-26

Maleinated derivatives

 #213
20180105764
2018-04-19

Dispersant viscosity index improver-containing lubricant compositions and methods of use thereof

 #214
20180087002
2018-03-29

LUBRICATING OIL COMPOSITION FOR CONTINUOUSLY VARIABLE TRANSMISSION

 #215
20180087001
2018-03-29

Lubricant compositions for direct injection engine

 #216
20180079988
2018-03-22

Grease composition

 #217
20180066204
2018-03-08

Lubricating compositions comprising an anti-wear/friction modifying agent

 #218
20180066202
2018-03-08

Lubricants containing quaternary ammonium compounds

 #219
20180051224
2018-02-22

Aromatic detergents and lubricating compositions thereof

 #220
20180023020
2018-01-25

Organic friction modifiers

 #221
20180023019
2018-01-25

Use of a boron-containing additive as an inhibitor of lead corrosion

 #222
20180016512
2018-01-18

Synergistic lubricating oil composition containing mixture of antioxidants

 #223
20180002630
2018-01-04

Hydroxyaromatic succinimide detergents for lubricating compositions

 #224
20180002628
2018-01-04

Lubricating oil compositions

 #225
20170369811
2017-12-28

LUBRICATING OIL COMPOSITION

 #226
20170362531
2017-12-21

GREASE COMPOSITIONS

 #227
20170355924
2017-12-14

Lubricating composition containing an oxyalkylated aromatic polyol compound

 #228
20170355923
2017-12-14

Lubricating composition containing an oxyalkylated aromatic polyol compound

 #229
20170349855
2017-12-07

Lubricating oil composition for internal combustion engines

 #230
20170349854
2017-12-07

Lubricant for gas insulated switchgear, and gas insulated switchgear

 #231
20170349852
2017-12-07

Thiol-carboxylic adducts as lubricating additives

 #232
20170342340
2017-11-30

Use of nitrogen compounds quaternised with alkylene oxide and hydrocarbyl-substituted polycarboxylic acid as additives in fuels and lubricants

 #233
20170335228
2017-11-23

Synergistic dispersants

 #234
20170335227
2017-11-23

Lubricating oil composition

 #235
20170335224
2017-11-23

Mixed phosphorus esters for lubricant applications

 #236
20170321146
2017-11-09

Lubricant compositions for reducing timing chain stretch

 #237
20170306261
2017-10-26

Power transmitting fluids with improved materials compatibility

 #238
20170298287
2017-10-19

Lubricating oil composition and method for manufacturing said lubricating oil composition

 #239
20170275558
2017-09-28

Grease composition

 #240
20170275553
2017-09-28

Additive concentrates

 #241
20170275552
2017-09-28

Additive concentrates

 #242
20170275551
2017-09-28

Additive concentrates

 #243
20170247629
2017-08-31

Lubricant compositions containing controlled release additives

 #244
20170247628
2017-08-31

Marine diesel lubricating composition

 #245
20170247627
2017-08-31

Lubricants for use in boosted engines

 #246
20170211011
2017-07-27

Synergistic lubricating oil composition containing a mixture of olefin copolymer dispersant-type viscosity improver and amine compound

 #247
20170211008
2017-07-27

ALKYLPHENOL DETERGENTS

 #248
20170211007
2017-07-27

Method for improving engine fuel efficiency

 #249
20170204348
2017-07-20

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