I looked in the old posts but had no luck... .
Can someone explain what the numbers for oil weights mean? I know there are straight weight and multi's and some are thicker and thinner. I was told this in trade school but still not sure what it means.
Can someone explain what the numbers for oil weights mean? I know there are straight weight and multi's and some are thicker and thinner. I was told this in trade school but still not sure what it means.