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Material Type: Notes; Class: TRACTOR POWER; Subject: TECHNOLOGY SYSTEMS MANAGEMENT; University: Iowa State University; Term: Unknown 2007;
Typology: Study notes
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surfaces
Ft = AV/h Dynamic viscosity (mPa.s), A area (m^2 ) V velocity (m/s), h film thickness (mm)
In hydrodynamic lubrication the oil film and not the metal projections are sheared
Saybolt Universal Viscometer (Saybolt Universal Seconds, SUS)
Viscosity Range SAE Viscosity At – 18 oC (0oF) At 99oC (210oF)
Maximum At Borderline Viscosity (mm^2 /s) SAE Viscosity Temp Pumping At 100 oC (21 2 oF) No. mPa.s oC (0oF) Temp Min Max Max 0W 3250 - 30(-22) - 35 (- 31 ) 3.8 ------ 5W 3500 - 25 (- 13 ) - 30(-22) 3.8 ------ 10W 3500 - 20 (- 4 ) - 25 (- 13 ) 4.1 ------ 15 W 3500 - 15 ( 5 ) - 20 (- 4 ) 5.6 ------ 20W 4500 - 10 ( 14 ) - 15 ( 5 ) 5.6 ------ 25 W 6000 - 5 ( 23 ) - 10 (14) 9.3 ------ 20 ------ ------ 5.6 <9. 30 ------ ------ 9.3 <12. 40 ------ ------ 12.5 <16. 50 ------ ------ 16.3 <21. 60 ------ ------ 21.9 < 26. 4
Kinematic Viscosity, Mm2/s, (Dynamic/density) Dynamic Viscosity, mPa/s
Designation API Engine Service Description ASTM Description
SA Utility Gasoline & Diesel No protection No performance requirements
No Additives, except may contain pour and/or foam depressants SB Minimum Duty Gasoline Mild Protection Antiscuff, resistant to oil oxidation & bearing corrosion
Some antioxidant and antiscuff capability
SC 1964 Gasoline Engine Warranty 1964 - 1967 Passenger Cars & Trucks Control high/low temp deposits, wear, rust, & corrosion
Primary use passenger cars (1964-67) Low-temp antisludge & antirust performance
SD 1968 Gasoline Engine Warranty
SE 1972 Gasoline Engine Warranty
SF 1980 Gasoline Engine Warranty Increased oxidation stability, improved anti-wear performance SG 1889 (includes CC grade characteristics)
Improved control of deposits, oxidation, engine wear and rust, corrosion
Designation API Engine Service Description ASTM Description
CA Light Duty Diesel Engines Protection for bearing corrosion and high temp deposits in NA engines, with high quality fuels.
Gasoline & NA diesel engine using low sulphur fuel.
CB Moderate Duty Diesel Engines Greater protection for wear and deposits, in NA engines with higher sulphur fuels.
Gasoline & NA diesel engine using high sulphur fuel.
CC Lightly supercharged, moderate Duty Diesel Engines, including trucks, construction & agric. equip. Protection from high temp deposits, rust and corrosion
Low-temp antisludge & antirust and light supercharged diesel engine performance
CD Severe Duty Diesel Engines, high speed & high output duty requiring control of wear and deposits. Protection from bearing corrosion, and high temp deposits in supercharged diesel for wide range fuels
Estabilished by Caterpillar in 1955
