joon

i see lots of people here do their own oil changes. my question is that if anyone adds stuff to clean out or dissolve gunk in their crankcase, like stuff you see at auto stores that help remove buildup by adding into engine then running it, and draining the oil, before adding new oil.

i used to do that to my other cars, add a can of gunk crank case cleaner, run it for 10 minutes then change oil...but for my 993, i wonder if that ok?

if there is a product out there that you would use on your 993, or if even necessary, please let me knw. thanks!!!

BobbyT

Just my two cents, but I wouldn't add any of this type product to a Porsche engine, or any other modern engine for that matter. Surely you have been using a top-quality, high-detergent oil, which keeps the engine quite clean. If there were any deposits in the engine, you are probably better off to leave them where they are, rather than put them in circulation where they can find their way into the valve lifters or some other place where they can do some real harm.

Leland Pate

Bobby hit that one on the head...
PLus, you can spring a leak if you unintentionally remove deposits that were previously blocking seals or mating surfaces. but the bigger hazard is having crap plugging a piston squirter or some other vital oil passage.

Kevin

Another note, our engine are dry sumps.. There isn't the oil sludging capacity of a V8 in the basement.. All the oil is stored in the oil tank in your right side quarter panel.. The only cleaning additive that I would use is techron..

joon

Hey All, thanks for the info.

amfp

Mobil 1 as an example include cleaning agents with the oil. So I would just change oil and filters more frequently to get to the desired results.