Originally posted by Typhoontracker
PLEASE!!!!!!!!!!!!!! Do not use that damned WD crap in a perfectly good model engine unless you do it just before you run it. DO NOT use it for after-run oil. In fact, just give it to a neighbor you don't like or use it to loosen up rusty bolts. (It doesn't do much for them either.)
WD-40, if left on Ferris metal parts, will cause corrosion since it is chloride based. This comes directly from my local FAA Inspector. It was demonstrated to him when he attended a corrosion seminar a few years ago.
If you want to use some type of spray lube, use something like LPS 1 or Tri-Flow.
Tony
Well they must have changed the formula as it isn't corrosive; I have heard that it was used around food processing machines and your FAA has prohibited its' use but I found out that it was because some of the components in it are poisonous.
I've used it for years, coated engines, put into a plastic bag for storage, in fact I just took one out that was in storage for 5 years; the case looks just like when I put it away, no corrosion.
What I have found out and read is it isn't a very good rust inhibitor as it dries eventually and nothing is left, no residue at all. I tried it, sprayed some on a sheet of glass, after 2 months you couldn't tell where it was sprayed.
Maybe allot of people don't know what it was designed for originally. The military wanted something that would dry and actually remove water from some of their components. This was designed to do just that; in fact the WD part stands for Water Dispersing and the 40 stands for the 40th formulation,
Also if it was corrosive it would have to state that right on the can, the can I have in front of shows - Poison, Flammable & Explosive but no where on the can does it say anything about corrosive but does state it will help protect metal so where is the corrosiveness?