Cleaning oil pan sludge without dropping it- before changing to detergent based oil

[pat in Santa Cruz]

drop the pan, pull the valve cover and clean it. If you're short on time, continue with ND oil until you have the time to do it the right way. Pluck's absolutely right...pay now or pay later.

[Growley bear]

Originally Posted by pat in Santa Cruz

drop the pan, pull the valve cover and clean it. If you're short on time, continue with ND oil until you have the time to do it the right way. Pluck's absolutely right...pay now or pay later.

I agree, pay me now or pay me later; sometimes the hard way is the easy way.
Years ago I switched a small fleet of school busses over from non detergent to detergent oil. At every regularly scheduled oil change interval, one more quart detergent and one less quart non detergent. Much more time involved than pulling the pan and side cover off of a model a engine; just my experience.
Chet