It takes 91 octane.

89 and your motor will ping, but the ECU will just retard timing to deal with it. You'll lose a little power with the ECU retarding timing.

93 and you might be loosing a little bit of power due to not being able to burn all the fuel, but no pinging.

 

since the car has been purchased brand new in 1997, the car has always been run with 87 octane....with 176,000 miles on it, i really dont think its gonna mess anything up

 

93 is what i use ok it should not hurt your car

 

the USDM RLs and Legends have a knock sensor, so you can fill her up with whatever you want.

 

optimum performance on premium. but you can run whatever level you want. you can definitely tell a difference in your MPG if you go with regular though. Regular will have your MPG, your acceleration, and transient throttle response in the garbage.

 

well todai i used 89 and like i started driving
and somtimes when im at a stop sign it kinda stalls it doesnt wanna go i have to press the gass pedal harder

 

Regular will have your MPG, your acceleration, and transient throttle response in the garbage

 

so its best to stick to premiumm right

 

definitely best to stick with manufacturers recomendations most of the time.

 

Yea, manufacturers dont make money on you buying a higher octane gas. They make that recomendation because they designed the car.

 

plus the car runs like shit. when i put 87 in when the car only ran on 93 it shook at like 90mph for some reason. i put in 93 from then on it never happened again.

 

93 FTMFW

 

We should use the recommended fuel, but I have experimented with both 87 and 91 for long periods of time each and have found not a single difference. NO MPG difference and NO power difference. It's all mental. I know I sound hypocritical but I still think a few dollars here and here is not going to kill us if we use the recommend 91 octane.

 

It's not mental, the car just has a good ecu to adapt

 

well todai i put in 93 again and i had no problems
no stalling or anything i gues i will stick to 93 i rather spend that extra 20 or 30 cent now rather than paying couple of hundred dollars later to fix a problem you feel me