Quote:

If you've been running a non-detergent oil for an extended period of time, keep running it. Don't switch as the detergents will tend to put all the nasty stuff in suspension.



My newly rebuilt 440 in the Coronet was very clean I thought. After running 15-40 Lubrication Engineers diesel oil, the rockers and top of the head is cleaner than I have ever seen in a motor. Everything looks like it has been cleaned with 0000 steel wool and penetrating oil.