I have seen occasional bearing failures on nova engine (cant really say it wasnt improper break in induced problem butttt) with all different fuels , I can also honestly say I personally see 6 gallons (ish) on any of my bearings with proper tune , fuel and storage . Never leave engine in humidity , never run engine out of fuel/lube and if you are gonna leave your engine in the race vehicle til next race leave it pointing nose down

hope this helps

I agree with Neal on last post