Results of not using proper fuel?
WTF are you ppl telling this guy?
If its stock with no modifications filling it up with 89 will do no harm, it'll just have poor performance.
Even if its modified, just drive casually until the tank is almost empty. If you have a properly functioning knock sensor, it'll just pull timing when detonation occurs.
If its stock with no modifications filling it up with 89 will do no harm, it'll just have poor performance.
Even if its modified, just drive casually until the tank is almost empty. If you have a properly functioning knock sensor, it'll just pull timing when detonation occurs.
Last edited by EVO8emUp; May 18, 2008 at 07:40 PM.
WTF are you ppl telling this guy?
If its stock with no modifications filling it up with 89 will do no harm, it'll just have poor performance.
Even if its modified, just drive casually until the tank is almost empty. If you have a properly functioning knock sensor, it'll just pull timing when detonation occurs.
If its stock with no modifications filling it up with 89 will do no harm, it'll just have poor performance.
Even if its modified, just drive casually until the tank is almost empty. If you have a properly functioning knock sensor, it'll just pull timing when detonation occurs.
dude. go blow your car up then and have a nice day. o yea and dont post up wtf happen to my car
better to play safe then to act like a know it all and end up with a 30k p.o.s.. witch is where you might be heading . man i dont know you but you just made me mad.
Yeah, that was very poor advice...purposely relying on the knock sensor to keep the car from blowing up? That's crazy. People have already posted threads in the past where they blew the engine due to running non-premium gas (some on purpose and some on accident). It's much easier and safer to add some high octane and be done with it.
Yeah, that was very poor advice...purposely relying on the knock sensor to keep the car from blowing up? That's crazy. People have already posted threads in the past where they blew the engine due to running non-premium gas (some on purpose and some on accident). It's much easier and safer to add some high octane and be done with it.
First of all is this a stock evo? And second, the stock computer has a knock sensor and alternative fuel and timing maps because Mitsubishi knows that people will put lower octane fuel in the car and they don't want to be changing out engines under warranty left and right. I believe you but I can't imagine a stock Evo blowing up from lower octane fuel, wow. I mean they have to use 91 octane in California and this guy said he put in 89 which is only 2 octane lower.
granted your correct but yet its still not smart. mitsu did in fact make it safe but as alot of 91oct uses have recorded some knock even at stock levels. im sure dropping in 89oct 1 tank is fine. but on a daily like people who run 91 i would say its a bad move. but for the kid who was just lending his mom the car and she dident know. it is best to just play safe. or do like a few said and just run it dry with no boost. but intentional use IMHO is a goofball move.
so you guys are saying that if your tuned for 93oct and you leave the state and have to fill up with 91oct its ok to drive it out untill you fill up with 93oct again as long as you dont full boost!?!
right. i could be wrong but i think as long as your just driving ''normal'' like no boost no high revs i think 87oct is fine for you or with any car. it only needs it to run really. but manufacturers set a oct level that is safe for normal and WOT driving. dont hold me to it though... but if you begin to go into boost or get on it then you will have issues. if you use 93 and need to leave the state and your only able to get 91. your fine.. fill it up. BUT stay out of boost. and just drive normal.
Last edited by EvoDan2004; May 18, 2008 at 08:37 PM.
If you run 87, 89 or whatever on a car tuned for 93 you will be fine if you stay out of boost. You will likely see some knock even out of boost due to the advanced timing in the low load areas, but it's not really dangerous and the knock sensor will start interpolating the low octane maps if it's gets bad enough. Detonation is way more dangerous under boost, so just keep your foot off the skinny pedal.
If you run 87, 89 or whatever on a car tuned for 93 you will be fine if you stay out of boost. You will likely see some knock even out of boost due to the advanced timing in the low load areas, but it's not really dangerous and the knock sensor will start interpolating the low octane maps if it's gets bad enough. Detonation is way more dangerous under boost, so just keep your foot off the skinny pedal.
Please....
I've owned turbocharged Mitsus since 1991, never once have any one of my cars blown up because of too low of an octane was accidentally used.
It is more dangerous to be draining the tank.
If you're just cruising at part throttle and not hammering on it, the lower octane will have no ill affect. I'm not telling you to use 89 all the time.
My god.
I've owned turbocharged Mitsus since 1991, never once have any one of my cars blown up because of too low of an octane was accidentally used.
It is more dangerous to be draining the tank.
If you're just cruising at part throttle and not hammering on it, the lower octane will have no ill affect. I'm not telling you to use 89 all the time.
My god.
Last edited by EVO8emUp; May 18, 2008 at 09:15 PM.
the 4g63 is a low compression motor. you will do no damage if you stay out of boost. high compression motors can be damaged if they are not equipped with knock sensors to switch to a low octane map.
one thing i need to mention is be careful if you have been reflashed. I will not mention any names but I have seen certain tuners copy over the high octane fuel map to the low octane fuel map and the high octane ignition map to the low octane ignition map. like others have said, there is a reason mitstu has those separate maps that are activated based on the knock sensor. if your tuner is guilty of this, you give up the ecu's failsafe for compensating for low octane gas
but if you are stock, you have nothing to worry about....although i do not recommend racing your car on that tank.
one thing i need to mention is be careful if you have been reflashed. I will not mention any names but I have seen certain tuners copy over the high octane fuel map to the low octane fuel map and the high octane ignition map to the low octane ignition map. like others have said, there is a reason mitstu has those separate maps that are activated based on the knock sensor. if your tuner is guilty of this, you give up the ecu's failsafe for compensating for low octane gas
but if you are stock, you have nothing to worry about....although i do not recommend racing your car on that tank.