Last summer I had a check engine light which was caused by a leaking gas
cap. To help seal it I put vasoline on the gasket. Now, during cold
weather I have trouble getting the cap off. After cleaning the gasket,
what can I put on it to help seal it without causing the removal
ASSuming you're talking about a rubber seal, silicone grease. That
said, it might be just as easy to buy a new gas cap from your local
dealer. (Toyota dealer if your Chevy/Geo dealer is less convenient.)
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