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Hello everyone. I have a 2007 chev Silverado with a 6.0 L gas engine. 300,000kms on it. I've recently been told that you can not run a heavier oil in the newer chev engines due to the filter screens for the active fuel management (variable valve timimg valve) plugging or restricting flow. Can...

Hello all. Wow.....what a source for information!!!! I thought I new a thing or to about engine oils. But now I'm not so sure? I have been twisting wrenches for the past 31 years and a certified diesel mechanic for the last 20 years. I am now a service manager at a small town commercial garage...