haha NorthSunny, have to= no but that is what it is tuned for, using something less for a period of time could cause issues but theres no guarantee that it will (as far as i know)
It won't damage the engine to run 87 through it instead of 91. In fact, at most you would just see some loss of power - but not a great deal. If you for some reason did actually start to experience knock, then you would need to switch to a higher grade gas...
2004 Vibe GT Lava Monotone, Moon & Tunes PackageMods:Homelink17" TenzoR Mach 10s, Black w/ Red grooveTintFormer Cars: '87 Subaru DL, '99 Chevy Malibu (hated it)'99 VW Passat (like it), '99 Volvo S80 T6 (wet dreams are made of it)
Quote, originally posted by Sunny »Do you have to use premium gas in the 2ZZ? Oh no! What did I start? I was kidding! Please STOP! my brain's going to implode.