In a message dated 4/25/05 10:47:44 AM Eastern Daylight Time, o...@aviation-mechanics.com writes:
> There is probably a specific temperature that the testing is performed at. > The W in 5W-30 says the oil can be used in Winter. > Orma & others, With the SAE viscosity index, so called multi-grade oils are blended to be equivalent to single grade oils at 2 different temps 100 degrees F and 32 degrees F. Example: 5W30 would be equal in viscosity to strait 30 at 100 degrees and equal to strait 5 at 32 degrees. Hope this helps Riley Collins Rutledge, TN KR2-SS Lycoming
