I usually put some waxy/silicone grease on any o-ring I install. Don't know if it's wrong or right; I do it to lessen the chance of it rolling out, and possibly tearing or pinching and becomming dislodged. I think the grease I'm using is safe for this application - that is; not degrading the o-ring. My 2 cents; any valid counterpoints will be considered and would be appreciated.

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82 300D Turbo 124,000 mi.