I just had a complete rebuild on my bike and I have been running Mobil 1 mx2t for my oil. Everything is running great but a buddy of mine said that if I would run it at 40:1 instead of 32:1 ,which I am currently doing, I would no get so much sooge and better throttle response. I am happy with the performance of the bike, but if I could get another gallon of gas out of my oil that would be great. I guess that 250's are not run as hard as a 125 so is 40:1 a safe ratio to run at? I have a 98 yz250 and ride mostly motorcross. Any help would be greatly appreciated. :confused: