Noob need help !

[Bluevitz-rs]

Originally Posted by beZzZ

Thanks every one, because I heard from a friend saying that 91 is better and cleaner than the 87, and when I use the 91 instead of the 87, I can actually save more fuel.

Will switch it back then. Thanks thanks.

Yeah, other than the fact that some premium fuels might have more additives and cleaners to their gas, use regular and the money saved can be put towards a bottle of injector cleaner every 6 months or so. Every tank would be a couple of bucks at least.

Also, the 1NZ-FE with a 10.5:1 C/R does have a high enough compression to use 91 or higher octane fuel, but the computer's program limits timing so that is runs on regular 87. I know a guy running a Stand Alone ECU on his N/A Echo and has increased his timing by 10° up to around 42° at the upper end of the RPMs and has gained roughly 7-8hp alone from that and premium gas.

You have to remember that this engine was designed with one thought. Fuel efficiency.