# US 10,865,354 B2 · Marine fuel compositions with reduced engine frictional losses > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,865,354 B2 - Document ID: US10865354B2 - Status: Granted - Kind: B2 - Application number: 16/811,233 - Filed: 2020-03-06 - Published: 2020-09-17 - Granted: 2020-12-15 - Earliest claimed: 2019-03-11 - Assignees: ExxonMobil Research and Engineering Company - Applicants: ExxonMobil Research and Engineering Company - Inventors: Aditya S. Shetkar; Kenneth C. H. Kar; Scott K. Berkhous - Web page: https://patentgrep.com/patent/US10865354B2 ## CPC - C10L 1/08: for compression ignition - C10L 1/1616: {fractions, e.g. lubricants, solvents, naphta, bitumen, tars, terpentine} - C10L 1/1608: {Well defined compounds, e.g. hexane, benzene} - C10L 10/02: for reducing smoke development - C10L 10/08: for improving lubricity; for reducing wear - C10M 105/06: aromatic - C10M 171/02: Specified values of viscosity or viscosity index - C10L 2200/0446: Diesel - C10L 2270/026: for diesel engines, e.g. automobiles, stationary, marine - C10M 2203/065: used as base material - C10N 2020/02: Viscosity; Viscosity index - C10N 2030/02: Pour-point; Viscosity index - C10N 2040/253: {Small diesel engines} - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS - C10M: LUBRICATING COMPOSITIONS (well drilling compositions C09K8/02); USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION (mould release, i.e. separating, agents for metals B22C3/00, for plastics or substances in a plastic state, in general B29C33/56, for glass C03B40/02; textile lubricating compositions D06M11/00, D06M13/00, D06M15/00; immersion oils for microscopy G02B21/33) - C10N: INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS ## Abstract Marine gas oil compositions corresponding to fuels and/or fuel blending components are provided that can provide improved friction properties within an engine. Addition of lubricant base stock to a marine gas oil composition can reduce frictional losses within an engine during operation. The benefits in reduction of frictional losses can be observed based on the difference between the indicated mean effective pressure and the actual work delivered by an engine, where the difference corresponds to the frictional mean effective pressure. ## Claims ### Claim 1 A marine gas oil composition comprising 1.0 vol % to 25 vol % of a lubricant base stock, the lubricant base stock comprising a T5 distillation point of 350° C. or more, a kinematic viscosity at 100° C. of 3.0 cSt or more, and a viscosity index of 80 or more, the marine gas oil composition comprising a density at 15° C. of 0.81 g/cm3 to 0.90 g/cm3, a calculated cetane index of 40 or more, and a kinematic viscosity at 40° C. of 2.0 cSt to 11.0 cSt. ### Claim 2 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil composition comprises a D86 distillation curve that is monotonically increasing. ### Claim 3 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil composition comprises a D86 distillation curve that does not include an inversion of greater than 1° C. ### Claim 4 (depends on 1) The marine gas oil composition of claim 1, wherein 50 vol % or more of the lubricant base stock has a distillation point of 380° C. or more. ### Claim 5 (depends on 1) The marine gas oil composition of claim 1, wherein the lubricant base stock comprises a hydroprocessed deasphalted oil. ### Claim 6 (depends on 5) The marine gas oil composition of claim 5, wherein the lubricant base stock comprises 50 wt % or more naphthenes. ### Claim 7 (depends on 1) The marine gas oil composition of claim 1, wherein the lubricant base stock comprises a kinematic viscosity at 100° C. of 3.0 cSt to 6.0 cSt; or wherein the lubricant base stock comprises a kinematic viscosity at 40° c of 14 cSt to 40 cSt; or a combination thereof. ### Claim 8 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil comprises 1.0 vol % to 12 vol % of the lubricant base stock. ### Claim 9 (depends on 8) The marine gas oil composition of claim 8, wherein the lubricant base stock comprises a kinematic viscosity at 100° C. of 6.5 cSt to 12 cSt, a kinematic viscosity at 40° C. of 32 cSt to 160 cSt, or a combination thereof. ### Claim 10 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil comprises 1.0 vol % to 5.0 vol % of the lubricant base stock. ### Claim 11 (depends on 10) The marine gas oil composition of claim 10, wherein the lubricant base stock comprises a kinematic viscosity at 100° C. of 14 cSt to 40 cSt, a kinematic viscosity at 40° C. of 115 cSt to 875 cSt, or a combination thereof. ### Claim 12 (depends on 1) The marine gas oil composition of claim 1, wherein the lubricant base stock comprises a viscosity index of 80 to 120. ### Claim 13 (depends on 1) The marine gas oil composition of claim 1, wherein the lubricant base stock comprises a viscosity index of greater than 120. ### Claim 14 (depends on 1) The marine gas oil composition of claim 1, wherein the lubricant base stock comprises 1 wt % or less of aromatics. ### Claim 15 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil composition is clear and bright according to Procedure 1 of ASTM D4176. ### Claim 16 (depends on 1) The marine gas oil composition of claim 1, wherein the marine gas oil composition comprises a sulfur content of 1000 wppm or less. ### Claim 17 (depends on 1) A method for operating an engine, the method comprising operating the engine using a fuel comprising the marine gas oil composition of claim 1. ### Claim 18 (depends on 17) The method of claim 17, wherein the engine comprises a marine diesel engine. ### Claim 19 (depends on 17) The method of claim 17, the method further comprising operating the engine at a load of 75% or more. ### Claim 20 (depends on 17) The method of claim 17, the method further comprising operating the engine at a load of 30% or less.