Wow, I like how none of this was mentioned by the OP, did you not know?
All he kept saying was $250, his friend paid $250, $250 for nothing and still a blown engine. If you cared to know, that $250 was for fixing the stripped oil pan that got ****ed up, and some proper oil put in.
Oh yea, in the OPs eyes they robbed him of $250 and did nothing to fix the problem.....If that is not ignorance I don't know what is.
I expect an apology from the OP.
At first I thought it was the used motor that was bad, but now it is clear it was because the engine was ran with no oil. Clearly the owner should be looking elsewhere for blame.
A mod should put [Resolved - Owner Mistake] in the title.