What does the 10, W, and 30 stand for. Probably a stupid question but o well, thanks.

John

 

10W30 is the weight of oil. It is a multi weight rating. The oil is 30 weight but acts like 10 weight (thinner) when the temperature is cold.....ensuring optimum lubrication when you first start up an engine.

 

Thanks for the info but it can't be that simple or all people would use 5W-50 or something like that. There has got to be more to it.

John

 

[QUOTE]Originally posted by jlvtx1800

 

Roadrage, thanks for the response

So if I am speaking to someone about oil and this comes up in conversation if I say the second number is the ture weight and the first number is the cold weather weight I would be correct?

John