a buddy of mine misunderstood, thought we said 4 oz of oil to five gallons of gas. ran 160:1 for 5 races in his 125 bike. only bought 2 32oz bottles, thats 80 gallons of fuel!! found out what he did and pull down his motor, no damage, oil all over everything. do the research, amsoil tested this oil at 300:1 without failure. it use to be call just 100:1, now it's called saber. i use it in everything, my bike, lawnmower, weed eater, chainsaw, it doesn't matter. no careful mixing just somewhere around 8oz to five gallons and let it rip. the logic is undeniable, your jets it your carbs are made to move x volume of fuel and oil, fuel is what cools the piston and chamber, oil lubes the crank and the rings. the less oil in the mix the more fuel in the charge, the less your bike smokes, less it drips oil out the pipes and so on, you get the picture. your motor runs cooler due to the added fuel, fouled plugs are a thing of the past. as far as firsthand knowlege this is what i have-- three years of running it in my banshee when it was a 350, one year of that on nitous, one year in the same bike as a 420 stroker on a NOS nitous system ( and if that didn't test it nothing will, that system SUCKED) and now a 450 stroker on nitous. not one seizure mark on my cylinder walls or lost bearing due to normal wear ( had a nos thing, but that was my fault, all the oil in the world wouldn't have save me). so there it is check it out, took a long time before i tried it, but now i know and wouldn't go back to 40:1-- that sounds crazy to me. let me know if you have any questions. take care