1 is a brand-new last year Grand Touring with the 900 ACE. Second one is a 21 Renegade with the 600 ACE and the third is a '17 MXZ with a 600 two stroke. The other 4 are the kids sleds, and they all have 600 two strokes. Problem getting rid of the old gas is where do I put almost 70 gallons of old fuel. All of them were put away with fresh 91 octane and stabil in the spring of 23 and I have started them monthly throughout our snow drought. I guess I will just have to pray for snow and take my chances.Drained mine out starting with new so let me know how it goes with 2 year old gas and what kind of engine.