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  1. K

    Synthetic Oil shelf life

    What's the shelf life of Mobil 1 Supersyn ?? Can get it for really cheap right now so wondeing if I should stock up on it. also can you open a 4.4L jug, use 3.6L and then keep the remaining litre ?? or do you have to throw it out ??
  2. K

    Group IV Motor Oils on the Market

    What brands currently use group IV base oils in their motor oils (specifically 5w20). I've heard that mobil 1 is both group III and IV from various sources and the only amsoil product in 5w20 is group III iirc. I have been unable to find information on Royal purple either. Please help.
  3. K

    Group IV Motor Oils on the Market

    UBB1-ML-874103-ML-
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