the logic i was referring to was "no harm-no fault" of DocL post, not yours, just for reference, but i don't fully agree with what you said either:
how about someone is doing an oil change for you and forgets the drain plug- the engine is a total loss- is he now only responsible for 5 quarts of oil? thats what you are saying.
That is exactly my point that you just proved. If the engine in your example was destroyed, that is irreversible damage. The damage to your car was obviously not irreversible.
if i do decide to pursue this it will be purely as a matter of principle and i will probably not bother with 'small claims' but go with the 'criminal negligence' as the lawyer suggests (btw, BAR assiociation in each state has free consultations if needed).
I dislike people like you who take advantage of the legal system just as a "matter of principle." That statement alone proves your intentions are based soley on spite. I thin you have better avenues to take if you want to be spiteful.