Originally Posted by
arejohn
Diesel oil? I guess is that it does not have the best detergents for the petrol residue.
If you follow the FFS oil change interval, is it ok to not add that last 1/2 quart?
Why would you want to start 1\2 quart low? I would at the least check the oil level before adding that last 1\2 quart - add if needed.