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.

 

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.

 

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.

 

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.

 

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.