Okay, this is a sure sign of senility, but I have 2 notes on oil for my swift DB-1, and two dipsticks that don't seem to agree with either oil amount. I think I had originally raced with 4 quarts of oil, but sometime later have a note to use 5 qts. I didn't write down a reason.
So my question is, how much oil do people put in their Swifts in an oil change? 4 qts? 5 qts?