WD 40 has its place, it is wonderful, but not for some things, one I know of is to protect a model airplane engine from the nasty water that rusts the ball bearings. This will not happen in a sleeve bearing engine.
My problem is stuck rings on two of my favorites - SupreTigre 90 engines. Secondary problem was busting the $14 ring I waited a week for on my first one...
So to unfreeze things I use "New" Gunk Liquid Wrench, really great on door hinge pins that are exposed to the rain, like my Express Van. It is really nasty black, maybe lithium ??, graphite ??, and you wouldn't want to get that on your clothes, so just be careful.
For the engines, I use auto trans fluid. One of my flyn buddies pointed out that it never evaporates, or jells up. I now use that as 2-cycle oil in my string trimmer, chain saw, & snow blower, for years now, no problem.
Any comments?
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