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At what mileage should a UOA be done? At oil change? At a certain mileage? I see guys doing it at very different intervals and was wondering which would give me the best overall indication of the condition of the motor. It only has around 5000 miles on it after my rebuild. Should I wait a little...

Well, I stocked up good on the Chevron Supreme 5W-30 Sunday. Now I have a question for you fellow oil gurus. Does Chevron market a synthetic blend oil? If so, where is my best bet to find it? I didn't notice it at Walmart, but they were low on their oil stock that day. I wouldn't mind paying...

At Walmart I was looking at the Delo diesel oil and the Delvac. It says its approved for gas engines also. What are the main differences between these oils and regular gas engine oils? Is it the detergent package and less breakdown of viscosity? Also, I understand that diesel oils have sulphur...

My fellow oil heads, the bottles of Chevron I bought had Iso Syn on the front. What does this mean??

I stocked up on Chevron Supreme! 5W-30. I understand that the difference between that and the Havoline is small. The back of the Havoline bottle said it is made of Group II base. The Chevron bottle did not say this, but I'm sure it is. Question: They have Motorcraft 5W-20 synthetic blend for...

Please educate this noobie on the differences of base stock numbers. I hear about group II and III and such, but have no clue as to what is what.

Anyone ever use the GM EOS oil supplement or the TK7 fuel additive? I have heard good results from both on the internet, but have never tried it personally.

What is the best all around conventional oil and filter? I currently run Super Tech oil and a Purolator filter, changed every 2000 miles. The Super Tech seems to cling pretty good, so I decided to start using it, 87 cent a quart isn't bad. If there are better conventional oils and filters out...