So I'm over at my brother in law's house a few weeks ago and he offers me a downed fir tree for my time since he doesn't burn. He hands me his 10 year old Stihl 029 and a can of gas and off I go. I do a pre-start check as per usual, everything looks good and the chips start flying. I run the first tank through the saw with no problems. I shut it down, add fresh gas and bar oil and off I go again. About 2/3 the way through the second tank, I notice the saw running rough to the point of dying. Thinking it might a chain issue I look it over and see that it's ok. It starts again, but harder than normal, but 4 or 5 minutes later I notice a smell like the thing is burning metal. To make a short story long, I check the gas and sure enough, no oil. I dump the no oil gas out, fill with the right mix with his blessing and she fires up without a problem. Maybe it didn't run as smooth, but it seemed to do fine and I finished cutting. At my expense I take it to the saw shop where I relay what happened and leave it for a check up. Two weeks later, I go in and they hand me the saw in pieces saying it's not worth the cost to fix, but I demand they at least put it back together. Yes it doesn't run as well at idle and maybe with less power, but my dilemma. Do I just suck it up and buy my brother in law a new saw and chalk it up. I have used this saw many times for my own gain cutting wood at his house, but at the same time it's ten years old. I could see pro rating it, but why should he have to come up with the difference when the 029 did everything he needed? He did tell me to use the gas he supplied, but damn I feel guilty. Maybe I've already answered my own question? And to think I was off to buy a saw of my own tomorrow!