I am starting to get the "puff of smoke" on my daily driver. 1988 350 TBI in a big ol suburban. I get it after the truck sits for about 2 hours. If I start it within the hour, there is not smoke. I know that eventually I need to replace the seals (I'll do that this winter), but is there anything I can add to the oil to make this problem less noticeable? For now, I just live with the puff of smoke and check the oil at every fill up.

It's not really useing any oil, but the puff of smoke is getting annoying. Any words of wisdom?

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Got Chevelles?
Jeff Carpenter
65 Chevelle/65 Elky (http://www.chevelles.com/showroom/jeffc1.jpg)
67 Elky Project (http://www.littlecars.com/67.JPG)
Team Chevelle Gold #61

switch to a single weight oil. if you normaly run 10-30 switch to plain ole 30w. if you normaly run 10-40 switch to plain ole 40w. and so on. the reason being that multi weight oils are designed to thin out as they cool off. that is why you only get the puff after it has sat for a long period of time. if you let it sit for just an hour, it does not have the time to cool down enough to thin out the oil enough. so if you use a single weight oil it will stay at at 40 weight when it cools off and won't be thin enough to leak. http://www.chevelles.com/forum/smile.gif

my '89 K1500 does the same thing, same engine with 200k miles.

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Brian
Durham, NC
My Toys:
69 Chevelle Malibu
2001 Camaro SS

Mine does the same too. ITs your valve guides I would bet. Not much to fix though. I agree, run a single grade. I noticed less with 50 weight oil (not 20/50w) straight weight.