Bayce

Hey guys, I was just wondering if any of you knew about the CORRECT fuel for my '83 "7" ? I live in Australia, and we have Super (leaded) Unleaded (The main fuel for cars today) and "Ultimate" (A bit more $$ than unleaded + More octane, better quality etc) I have been running "Ultimate" unleaded, it costs 5 cents per litre more but seems to be best. Was just wondering though, if "Super" or what is SUPPOSED to be in her!! I dont think unleaded was even around in '83, when "Madeline (My much loved 7 - was born) - Any clues or tips boys?
Craig.

JIMMY54

iTrader: (2)

Use unleaded fuel only. Some people on here will tell you the lowest octane fuel is best for a rotary but for my car alteast it runs best with high octane. Experiment with different levels of octane and see whats best.

alien_rx7

I'm in the lower the octane the better school of thought. If a car wins the GTU(?) championship 2-3 times in a row with a race prepped engine only running 86 octane, there has to be something to it.

Unless your running forced induction or really radical timing you're wasting your money.

Manntis

A normally aspirated rotary (no turbo) runs best on lower octane.

Octane, after all, is resistance to detination. Less explosive, basically. In a high compression engine that's neccessary so the squeezed fuel/air mix doesn't pre-detonate and damage the engine, but in a normally aspirated engine it just means the fuel might take slightly longer to ignite and therefore not push against the rotor at the optimum time.

Bayce

Ah. . . so I guess just the NORMAL unleaded (Also 5 cents per litre cheaper) is better? I'll save some $$ and give that a go then. Yup, its just a standard, 12a 5 speed, no turbo nothing fancy.