[RM7]

<---goes to check gas tank. Phew! My gas is not evaporating!

That's a load of BS. Yeah, a statement from the oil company/email would be a good place to start.

Also, make sure you've written down the tech's statement or a summary of it, and signed it as your copy of their statement-accurate to the best of your ability. You need to start documenting who said what and on what day, etc. You need to show that they are throwing out BS diagnosis and accusations.

Oil doesn't just f*cking evaporate, that's WHY we use it in engines.