In my 96 Volvo 850 turbo with 272,237 miles when you accelerate hard it smokes some. It's enough to see in the rear view mirror but I'm not smoking up the entire road. The smoke is black. Is this extra fuel like on a diesel or oil getting past the rings? I noticed this while using rl 0w20 and pu 5w30. I was wanting to try m1 0w40 next. Will the heavier oil help? Would I be better off with m1 hm? 5w30, 10w30, or 10w40 if so? Again can only see smoke if car is floored, but I'm using a little oil too.
Thanks
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