[tacticalogic]

it dissolves many plastics, and certain other materials, quite readily.

It also dissolves "varnish" deposits in fuel injectors, and on intake valve stems. Valve lifters will accumulate a ring of varnish around the bottom that makes them not want to come out of the hole if you have to replace them. We used to dribble acetone or lacquer thinner down a length of welding rod held at the edge of the lifter and let it run down between the lifter and block to soften it up so they would come out easier.

[SAJ]

Rather imagine that, diluted to 522-1 in gasoline (7 ml/gal) and vaporised, that the solvent effect you describe is either not anywhere nearly as potent, even possibly non-existent.

Not that I doubt your word at all, but, after 6 years of running my Nissan Max with this additive, my mechanic (and has been for 20-odd years) indicates no such problem as you describe.

[SAJ]

Apologies, misread your post entirely (backwards, in fact). We’re on the same page — thks for pointing out another benefit.