Even the cheapest oil you can buy today is way better than anything in 1950 - period!
I personaly use straight 30 oil because the multigrade oils break down after 6000 miles and are not much multigrade anymore.
I swear by Frantz filters and Mathy Treatment, but this is an almost religios question anyways. :rolleyes:
Also it is verry theoretical. In real live it probably doesn`t mather at all. As long it is full enough. .... and even that:
Some friends with a worn out, cracked 216 and completley shot main bearings took it on the engine dyno stand just to see how long it will run without any oil.
Well it run with 4000 rpm till the 2,5 gallon gasoline canister was empty.
Cast iron wonder - need I say more?
