I run 30% Trinity monster horsepower - Power blend with 12% Synthetic and racing castor oil. I have over 2 gallons through my SH .28 and have no longevity issues.

My SH dosn't run any hotter on 30% then it did on 20% (About 250 in good tune). If there isn't more heat and the oil content is there, longevity will be nearly the same...Kind of like putting 93 octane in your real car. More performance and the same life expectancy.

Just watch the oil content - some fuels are as low as 8% - that is too low - except for racing. 14+% is too high and will cause one-way bearing slipping and tuning issues. 12% seems to be the right mix.

Many people also swear by O'Donnels, but there isn't any around here.