Ahh.. Yes, I'm mistaken.. Powerblend is Synth Blend.. Just picked up 3 bottles of it today.. It's the best oil I've ever used..I think you should be fine running 89 octane with your choice of oil in both. :2cents:
Hey Stan, I also use Echo Powerblend, but it's a semi-synthetic, not full synthetic. Are you talking about the new Echo Red Armor stuff that's they started selling when they merged with Shindaiwa? I know that's a full synthetic, and I was actually going to try it out. :2th:
Yes, LawnBoy says use 87, however there is ABSOLUTELY no technical reason you can't use 91. It will do no harm, the engine will run just as good, and it would be better to use 91, if that is ethanol-free.Lawn Boy mowers only use 87, regular unleaded gasoline. Look in any lawn Boy owners or service manual. A lawn mower is a Tool, not a race car.