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- Sun Jul 01, 2012 9:38 pm
- Forum: Engine
- Topic: Mobil 1 grades
- Replies: 8
- Views: 6620
Re: Mobil 1 grades
I have two 1986 GTV6s that are running very well. I want them to continue to do so. I became very concerned about what kind of oil I am using once I learned that the EPA has required oil companies to remove ZDDP from their oils because of the mandated 100,000 mile catalytic converter requirement. Ba...