I mixed 5 pouches of oil (pouch per gallon) in a jug with 5 gallons of gas in our polaris snowmobile. Started the engine and warmed it up 5-10 minutes before riding across a field on our farm and half way back before the engine blew up from a lean condition. I rode very easily not even over 3/4 throttle during that time. Opti 2 wont stand behind this product and told me gas has gone down in quality over the years so the gas was the problem. The same gas from the same caseys general store I used a week before with valvoline multipurpose oil at 50:1 didnt blow up my engine as it should have with their statement. I had a fresh 5 gallons of gas mixed with opti 2 oil to their marks because the napa guy said it was all they had and it says it's good for everything. Severely scuffed pistons are a sign of the oil film breaking down.

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