Soy-based penetrants/lubricants.

[nthach]

I've picked up a can of Nutek's LubFix at Home Depot a few weeks ago, and I was impressed with how it was able to loosen severely rusted/corroded plumbing parts with ease. Are soy-based lubricants like these a wave of the future, my penetrant of choice is GM Heat Valve lube, but I may have to pick up some more BoltOff when the local HD has more in stock.

 

[Shannow]

biodiesel is a pretty good penetrator.

Made some (out of canola), and it wet and worked well.

Try making some (coke bottle method), and see how it works/compares.