Kalmcleod, I tried everything, all types of cleaners and aluminum specified cleaners, and I still couldn’t get the staining out. Finally, I decided to paint it with engine enamel paint. Very satisfied with the result. I have about 600 miles on the motor with no issues. Changed my oil once so far and the oil that spills on the pan from the filter cleans up so easily. It doesn’t have that factory sheen but it looks really nice and I think the final result looks great.
1966 GTA replica, 1967 Duetto, 1987 Quadrifoglio
1972, 1973, 1974 Montreal