14-01-2022, 02:46 PM
ZDP is a zinc additive that protects high stress points. Not needed in a low stress engine like the Austin. Essential for some 60s classics and highly tuned engines. Especially for aggressive cams on flat tappets.
I would use a basic straight 30 initially.
Any modern oil is better than what would have been available originally.
I would use a basic straight 30 initially.
Any modern oil is better than what would have been available originally.
Jim