Texas D,
That is what I found listyed. The distributors. In the yellow pages they have a list for Citgo, Pennzoil, Moble, and Shell.
Some had 800 numbers and some didn't.
Klenger,
I think I know what you are saying. I could just say it is Pennzoil and they wouldn't know. On the paper work they ask for brand and type of oil. I wouldn't lie to them because it is my understanding that the different brands have different additive pakages. The guy that I got the kit from said if I wanted to know how the oil was breaking down, I should get two kits. Send in a sample of new oil first. After receiving the results, send in the other one from the truck.