Hi; I am new to your forum but I have viewed and read a lot of the contents for a year or so by now. I have worked and repaired chainsaws for 40 odd years and have recently started to collect and rebuild vintage Pioneer saws. I have recently become the owner of a 1948 IEL Model AB. my question for anyone out there with knowledge on old IEL`S is about the mix oil available today. It states on the break instructions to mix the gas at a ratio of 8 to 1 using SAE 60 or 70 grade oil. Todays mixing oils are nowhere near that thick. This saw has a nos piston, rings,bearings and seals with the light honeing that removed only the stains where the piston had set for 50 odd years, it has great compression and bright spark . Should I start it using todays mixing oils at the recommended ratio ?