Well I did more research, and I thought forever that the Klean-strip SLX Denatured Alcohol that I have been running for the past 16 months was 99% ethyl alcohol, but in fact it is even better!
I discovered (thank you SlowCar on evoM):
"the parts affected are the valves(EPDM) and diaphragm(santoprene) in the shurflo pump and seals in the solenoid valve
methanol and ethanol = alcohols - R-OH
gas = hydrocarbon"
gasoline eats away at the above listed parts and has even brought aquamist kits to their knees!
Kleen-Strip SLX Denatured Alcohol is:
45-50% Methanol
45-50% Ethyl Alcohol
1-4% Methyl isobutyl ketone
No wonder I love this stuff so much, I'm dumping out my E98 blend and going back to just straight alky. I've considered switching to 100% methanol recently, but now that I know I've been running it and the denatured alky works, I think I'll go with what I know
Threaded Mode