I've never heard of Amsoil, do they sell it at regular Auto stores? (I'm west coast if it matters) I'll have to give it a try

 

I use Royal Purple 5w30 year round. It is a great oil and will give you a little better performance.

 

All of your engine oil problems answered:
http://www.chris-longhurst.com/carbi...oil_bible.html

 

No amsoil can only be purchased online or from an amsoil dealer. Auto parts stores do not carry it. They do however carry Mobil 1 at most regular auto parts stores. Most people buy that out of convinience, but I like Amsoil more. Do a google search on that and you can see that they are two of the best synthetics out there.