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    Full Synthetic 15W-40 Diesel Oil okay in 2004 Vortec 4200 VVT Gas Engine for Cleaning?

    I am a Newbie here and This is my second time posting on here with a question. I have just bought a 2004 Chevy Trailblazer with the Vortec 4200 VVT I6 Engine with 153,000 miles on it. I did not get any service records with the vehicle when I bought it so I don't know engine oil change history...
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    Nano Pro MT Oil Stabilzer

    Anyone Familiar "Nano Pro MT Oil Stabilizer?" I've read it was designed through the military and it is some pretty good stuff. I want to add heightened protection to my 2004 Chevy Trailblazer with the Vortec 4200 VVT I6? it has 153,000 miles on it. I just bought it and since I don't know about...
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