10W-40
Common engine oil
10W-40 is a grade of motor oil indicating its viscosity at different temperatures.
The 10W means it flows like a 10-weight oil in winter (the W), while 40 indicates its thickness at operating temperature.
This multi-grade formulation protects engines in both cold starts and hot running conditions: My car takes 10W-40.
Petroleum for machinery
- engine oilLiquid reducing friction internally
- crankcaseEngine's lower enclosure
- oil changeReplacing engine lubricant
- dipstickFluid level indicator
drain plug · oil filter · quart · lube · conventional · synthetic blend · full synthetic · high mileage
Vehicle engineering standards body
- weightMeasure of heaviness
- thicknessDepth of material
- flowUnbroken forward movement
- temperature rangeExtent of heat variation
kinematic · lubricity · cold start · fluidity · consistency · thinning
Coating to reduce friction
- frictionResistance between touching surfaces
- detergentChemical cleaning agent
- dispersantAgent breaking up concentrations
- antioxidantOxidation-preventing molecule
Usable any time
- heat resistanceTolerance to high temperatures
- moderate climateWeather lacking harsh extremes
- thermal protectionDefense against temperature extremes
motor oil
Petroleum for machinery
- engine oilLiquid reducing friction internally
- crankcaseEngine's lower enclosure
- oil changeReplacing engine lubricant
dipstick · drain plug · oil filter · quart · lube · conventional · synthetic blend · full synthetic · high mileage · owner's manual
SAE
Vehicle engineering standards body
temperature range · kinematic · lubricity · cold start · fluidity · consistency · thinning
lubrication
Coating to reduce friction
- frictionResistance between touching surfaces
- detergentChemical cleaning agent
- dispersantAgent breaking up concentrations
antioxidant · zinc · metal-to-metal · piston rings · valve train
all-season
Usable any time
- heat resistanceTolerance to high temperatures
- moderate climateWeather lacking harsh extremes
- thermal protectionDefense against temperature extremes
- lubricantslubricant, lubricants, lubrication, grease, motor oil
- motor oilmotor oil, synthetic oil, full synthetic, synthetic blend, high mileage oil
- oil changedrain plug, dipstick, oil filter, oil pan, synthetic oil