I heard around that GTs need premium gas. Is this true? And what would happen if you used just 87 octane if it is?

 

The motor will run like *** and you will get knock+ping.

It says that for a reason. Dont be a cheap ***

 

with gas prices i use the cheap stuff and i have no problems........ so far

 

Mine HATES reg, CEL, unhappy sounds.. etc. I wouldnt suggest it. The difference at the end is like a couple dollars more... you bought the car, now you have to pay for it... shoulda thought ahead. Like Seb says 'dont be a cheap ***'

 

I have an 02 eclipse GT and I run 87 octane, and I have no problems and I've been running that for about 7 months... *shrugs* the car doesn't label it's perfered gas anywhere on it...

 

mine says it right at the gas cap....Premium only

 

This is why mitsubishi gets a bad f-ucking reputation. Because people f ucking abuse their cars and dont maintain them. This is a prime example and it f ucking pisses me off.

 

I believe the ecu actually changes the fuel maps and timing if it detects knock from using less than premium fuel

 

After at least 200 fu cking miles. Dont you dare try and justify it. There is NO excuse for it.

 

Dude, Sebs 110% right here, on both things. The car was DESIGNED to use premium fuel. Trying to run anything else will even in most places VOID your warranty (to a point). He also correct in this being a MAJOR reason why Mitsus (especially eclipses of the 4g63t vareity) get a bad rep.. you know how many idiots I knw running **** (87) thru thier t/c'd motors? Thats terrible for the car. It may not seem like it now, but I can guarentee that over time it WILL cause a problem. To those of you claiming that your car doesnt say its prefered fuel, that is likely. Remember that it was a STICKER on the inside of the fill cover, and a LOT of dealerships (mostly used cars) pealed them off (or never installed them to begin with) as to make it seem to run 87 thru em, that way they seemed cheaper to own and fuel. When people brought them back to Mitsu "under warranty" they claimed that the consumer peeled off the sticker, and they were thusly NOT liable for the damages done to cars. deadeclipse.com had a thing about it, and Ive heard of it happening. (Not just on Mitsus either, Benz, Ford, Lexus and a few others.) But TRUST me, those cars GT/GTS and the GST/GSX MUST run premium.