The best corrosion loosening agents?

Diesel is the one for me however I have been told plenty of times if you are trying to loosen a bolt thru a aluminium casing were the corrosion has grown around bolt the thing to use is insect killer spray has some sought of chemical reaction ???????????I cant not confirm or deny this having never tried it but I guess there must be some truth as I have been told a few times

Paul

I have found a solution of 100% heat juice works the best, with an application of any brand of light oil.

Heat juice ???

Heat juice ???

Some kind of heat: propane, electric heat gun, oxy/fuel torch, charcoal fire ==pick your poison. The treasures I find are stuck from years if not decades of neglect from sitting outside. It is normal for me that no amount of so-called penetrating fluid would loosen the stuck bits without a careful application of heat to break the bonds of rust. I once had a Mac 15 chainsaw that I dug out of a dirt pile, it took several weeks at least of hot and cold cycles with wd40 to get it turning.

Some kind of heat: propane, electric heat gun, oxy/fuel torch, charcoal fire ==pick your poison. The treasures I find are stuck from years if not decades of neglect from sitting outside. It is normal for me that no amount of so-called penetrating fluid would loosen the stuck bits without a careful application of heat to break the bonds of rust. I once had a Mac 15 chainsaw that I dug out of a dirt pile, it took several weeks at least of hot and cold cycles with wd40 to get it turning.

Aaahh ! Smoke wrench ...

This is going the way on the discussion of best motor oil!! :confused2:

It is well known that Kroil oil is the best 😛ound:

I have had great success in using a product called Open And Shut. Best I have found