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  1. STS-V Series Forum - 2006-2009
    What an amazing Cadillac!! The car being a 2007 with an estimated 80k price tag new, far from my reaches back then but as time will have it, some things are worth the wait! V8s Forever
  2. Northstar Engines and System Technical Discussion
    I read that the most efficient oil for the Northstar and other newer engines is GF3 rated oils. Mobil One is rated at GF2 while some blends and non-synthetic oils are rated at GF3. I have been using a blend of synthetic and non-synthetic oil rated at GF3. I don't know which is better for the...
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