Several questions about oil.
 

Ok, i have some questions about oil and the people i have talked to recently dont have a clue what thier talking about so i was hoping that someone here could give me some answers.

What do the numbers mean as in 10w-30? I know the 10w means that it is a 10 whight oil, but how exactly does that compare to other oil weights like 20w-50.

What does it mean when there is only one number.

How do you pick the right oil for your car?

What oil is best for performance engines.

Thanks, and i hope that this will answer questions that others might have too.

Here's some sites that should help you out. Just copy and paste them in the address bar if they don't showup as clickable links.



http://www.motoroilbible.com/index.html



http://api-ec.api.org/about/index.cf...02003002000000


http://www.performanceoiltechnology....ubrication.htm



http://www.vtr.org/maintain/oil-overview.html



http://www.howstuffworks.com/question164.htm



http://api-ep.api.org/filelibrary/ACF28.pdf

The W after the first # is the "winter" weight, which is the viscosity of the oil in colder temps (there is a certain temperature they use as a benchmark, but I forget what it is). The second # is the "hot " weight, which is what the viscosity is at higher temps. Viscosity simply means "resistance to flow" and the higher the #, the thicker the oil. Two #'s together (10w-40) means a multi-grade oil. A single# (50w) is a straight grade oil which means its viscosity does not change when hot.

Visit www.lubedealer.com/midohio and from there you can go to Amsoil's web site. You can find out everything you want to know. Take a look at preferred customer program and buy at wholesale prices. Series 2000 0W-30 oil is reommened for all cars requiring 5W-30 or 10W-30 motor oil. Good luck.