Ok, here's a question on synthetics from another angle.
Is there any evidence that synthetic lubricants, specifically
synthetic gear lubes (80W90, etc), do not play well with RTV
(silicone) sealants? I've read that some synthetic lubes
will chemically atack RTV sealant.
I know this is true of some petroleum distillates (used as solvents)
and more specifically gasoline, but I thought RTV was not only safe,
but intended for things like differential and valve cover gaskets.
Now I gotta wonder about motor oils too......
Not Dead Yet