UNIVERSAL ALL-SEASON ENGINE OIL Russian patent published in 2002 - IPC

FIELD: petroleum processing, petroleum chemistry, automobile technique. SUBSTANCE: oil comprises the following components, wt.%: alkaline calcium alkylsalicylate, 3.0-5.0; alkaline calcium sulfonate, 0.5-1.5; zinc dialkyldithiophosphate, 1.5-2.5; polymethacrylate of the grade "D", 3.0-5.0; polymethylsiloxane, 0.003-0.005; hydrogenated block-copolymer of butadiene with styrene, 1.5-2.0; urea alkenylsuccinimide 2.5-3.5; high-molecular Mannich base, 2.0-2.5; residual component with kinematic viscosity 15-20 mm²/s at 100 C, 5.4-6.0; low-viscous distillate oil with kinematic viscosity 2-4 mm²/s at 100 C, the balance. Engine oil corresponds to requirements of class viscosity 4z/14 and the group of exploitation properties "D". EFFECT: improved low- temperature properties and providing safety work of high-forced gasoline and diesel engines of automobile technique in wide range of temperatures of environment air. 3 tbl