The weights given on oils are arbitrary numbers assigned by the S.A.E. (Society of Automotive Engineers). These numbers correspond to "real" viscosity, as measured by several accepted techniques. These measurements are taken at specific temperatures. Oils that fall into a certain range are designated 5, 10, 20, 30, 40, 50 by the S.A.E. The W means the oil meets specifications for viscosity at various low temperatures depending on weight, and is therefore suitable for Winter use. 5W is tested at -25C, 10W at -20C, 15W at -15C, and 20W at -10C.
Sae-20w
sae document j300 defines the highest single grade as 60. this is in reference to viscosity and not the quality of the oil
An SAE Grade 8 bolt will have 6 radial lines on it as shown below. \ | / / | \
SAE 10w30
The ISO viscosity grade of Shell Tellus 37 is 32 and its SAE viscosity grade is 10W. These viscosity grades indicate the fluid's viscosity characteristics at different temperatures and operating conditions.
SAE 10w30 synthetic.
SAE viscosity grade
SAE 5W30 or 10W30 I would recommend the SAE 5w30 synthetic blend.
SAE is an acronym for the "Society of Automotive Engineers" and when used in conjunction with tool grade or measurement (not oil), is a standardized unit of non-metric measurement. Simply put, in measurements it means "Non-Metric". The name "SAE" used to grade motor oil has a totally different meaning, although instituted by the same society.
SAE 5w40 full synthetic oil.
the oil grade in which is specified by the parts manufacturer
SAE sets standard sizes and grades for bolts.Size and Grade are different:Size is set By the SAE (society of Automotive engineer's) and is stated as thickness followed by thread pitch followed by length 1/4 x 24 (threads per inch) x 1 1/14 (inches long) Grade Is a statement of strength and hardness. Most auto hardware tends to be grade 5 and some high strength stuff is grade 8 or grade 12