ive been using byron 30% with 11% lube..i love it. i have tried sidewinder and a few other fuels and this is by far the best. I just started the car up this weekend and its been sitting for about 10 months....yes i forgot to clean out the old fuel and run some oil through it. Guess what? it started up like i had just shut it off. it wasnt gummed up and the fuel is around 10 moths old too....i ran half a gallon this weekend with no issues. I'm a believer in byrons...i wont run anything else. I used to drive 1 way an hour to get this stuff before i convinved the LHS to carry it, now thats all he carries.