Sapo_feo
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I have seen a few mentions of ProMix 1 size fits all oil here but not much information about it so I thought I's share my experience.
I got a bottle at a box store thinking the price is right and it's made in the USA so what could go wrong. I ran it in my old brushcutter and Husky 51 and didn't notice any issues. I put it in my Makita 6401 and 12 minutes later it was dead. Toasted piston. Since I'm an idiot I didn't think it could be my mix so I made a double dose batch and ran it in my little Shindaiwa 360 to break in a new piston. 2 minutes later it was dead. It could be me, or it could be ProMix, but something isn't right. I stopped using it and after new jugs and pistons the Makita and Shin are doing great back on Husky 50:1. Small or larger newer saws it doesn't seem to matter,they die. But it didn't damage my old saw or brushcutter. Just my opinion. Side note, I always use fresh non-ethanol gas.
I got a bottle at a box store thinking the price is right and it's made in the USA so what could go wrong. I ran it in my old brushcutter and Husky 51 and didn't notice any issues. I put it in my Makita 6401 and 12 minutes later it was dead. Toasted piston. Since I'm an idiot I didn't think it could be my mix so I made a double dose batch and ran it in my little Shindaiwa 360 to break in a new piston. 2 minutes later it was dead. It could be me, or it could be ProMix, but something isn't right. I stopped using it and after new jugs and pistons the Makita and Shin are doing great back on Husky 50:1. Small or larger newer saws it doesn't seem to matter,they die. But it didn't damage my old saw or brushcutter. Just my opinion. Side note, I always use fresh non-ethanol gas.