bmxstreet15

I have a quick question. I have always put after run oil in my cars. I just purchased a CAP 580 and have an OS 70 fourstroke in it and it fits perfectly. The oly way to ad after run oil is to remove the prop, spinner and cowling. Do I need to use after run oil in a four stroke?

Flying freak

Umm if your goign to use them it (say withing a month) just run the fuel out of it.. id only go through that if it were to be stored for the winter or something and even than can you not get to the glow plug?

smithth

Ive never used after run oil and never had a problem with any of my OS engines running properly. This includes long and short term storage. I just make sure I burn all the fuel out of the engines after Im done with them.

bmxstreet15

I can get to the glow plug only if I remover the spinner, prop, and cowling. So it should be okay if it doesnt sit for more than a month?

MinnFlyer

My Feedback: (4)

I never use it either. In fact, with 15% Cool Power fuel (Which is what I use) they recommend NOT using it

BillyGoat

Guess I’m gonna go against the grain here and say I use after-run oil consistently. Does it do any good? I know it doesn't hurt and it makes me feel better. Any how for four strokes I use a syringe and shoot oil into the crank case breather, then turn the prop over a few times.

scratchonly

Running a 4S dry does next to nothing. The contaminated oil remanes in the crankcase.