Bummer. I have loaned saws out on occasion but only when I provide my own fuel mix which they pay me for. I also only loan them to people I know.
What I have done now though is buy a few older saws just for loaners and because I got them at the right price. A 55 Rancher and now "maybe" a 288XP if they need a bigger saw. I did loan out my Snelling ported 390XP to a customer's son for cutting some larger Eucalypt stumps recently and that put a grin on his face. He won't be too happy in future as he'll never get that one as a loan saw again.