Pure 98RON gas vs 25% ethanol content gas
 

Hi there! I have quite a problematic situation, and i need a straight answer.
I own a turbo GT86, the only one in Argentina, where we use good pure 98RON gas. BUT, i also travel to Brazil from time to time, where the gas sucks... bad... all gas there has a minimum of 25% ethanol (Premium gas with 91 oct) up to 27.5% ethanol (normal gas 87 oct BAAAAD)
I haven't travel to Brazil after the turbo install, mainly because im afraid that the fuel will compromise the engine. What do you guys think..? will i have some problem, or not at all? can the OEM ECU compensate for that amount of ethanol or only with a flex fuel kit?
Currently running 290whp at 7psi, on a very conservative tune (that's what my tuner said anyways).
Thanks!

Have you asked your tuner? I would think the ECU could technically compensate with the LTFT and that amount of ethanol if your tune is solid but I wouldn't want to.