Back in the early 50's I worked after school in a service station where we did those old air cleaners on 37 etc. Chev's and Pontiacs, and some of those other makes like **** or Dudge.
We just put the same oil as the crankcase in those air cleaners and never saw a problem. Sure saw some pretty hard sludge in some of those air cleaners though. Good memories! I'll stay like that with my 46, 235 that is in a 2 ton.
George
