Originally Posted by Cito Pelon
I don't get this "burn off" thing about synthetics. I have the same amount of Amsoil in the crankcase after it's been in the engine for a year. Granted, I only put apx 8-10k on my vehicles in a year. But if there's no change on the dipstick after 10k miles, I don't see how 30k miles would make a change on the dipstick. Apparently, there's no burnoff with Amsoil.
And if there was "burn off", I'd see it on the sparkplugs, they'd be fouled. My sparkplugs have always been remarkably clean.
I don't know anything about other synthetics, the only synthetic I've ever used is Amsoil. So maybe the other synthetics have a burn off problem, but I haven't seen it with Amsoil.
With any syn oil the molecules are way smaller and that is why there is the burn off or leaking problem. It runs along the same line as filling your tires with nitrogen instead of oxygen. Nitrogen Molecules are larger so they won't leak out.