prowler1
Junior Member
Either grade works great, prefer premium to regular myself.
I always use Premium grade in high revving motors. I'm also positive that the gas mileage increases with a higher burning octane, which burns hotter and cleaner with the added Ethanol. Lucas makes an Ethanol additive which cleans and helps burn it off. I've never used it but I've heard good results.
Good luck with whatever you use :rockon:
Also: Modern engines adjust timing to meet the octane requirement. So if the motor detects predet it retards timing. So what happens to gas mileage and performance when we retard timing? There is a lot to this science!
I don't know about the FZ6, but my Saab, when it detects detonation, not only pulls timing, it also adds fuel.
Also: Modern engines adjust timing to meet the octane requirement. So if the motor detects predet it retards timing. So what happens to gas mileage and performance when we retard timing? There is a lot to this science!
I don't know about the FZ6, but my Saab, when it detects detonation, not only pulls timing, it also adds fuel.
That's true about predet on a lot of cars but I have no idea as to how the FZ6 would detect knock unless it was seeing an anomaly that occurs in the O2 and that would mean the pre 07s wouldn't have an O2 sensor.
Dunno!
Hmmm. . . : lots of talk about compression being a big factor in detonation. Everyone skipped the part about ignition timing, valve timing/cam timing, hot spots in the combustion chamber, aluminum dissipating heat well, combustion chamber design, exhaust header design (like length and back pressure) etc. . . to name a few.
Added factors; load, gearing, air temperature, tire diameter, rate of throttle opening, carbon build up in the combustion chamber, altitude. . . blah blah blah. . .
Those things all play a roll in what an engine will accept octane wise.
- If it pings, detonates, rattles, suffers from pre-ignition, or transfers aluminum from the piston top the spark plug (does anyone look for balls on the plugs?), you need to run higher octane fuel. This applies more so in higher temps at lower altitudes (sea level etc.).
If you don't know what pinging or detonation sounds like, get it hot like 210F and take off in 2nd gear without slipping the clutch or raising the RPM above 1400. It'll likely ping!
That's the sound that gives you a hint its time to upgrade fuel. At 12,000 RPM there is so much noise going on you'll likely never hear it detonate. But if you suspect it suffers from detonation, Pull the spark plugs and LOOK at them very closely!!! Peppered spots and aluminum transfer will show up on the plugs. And it may be only ONE plug detonating, so check them all. One faulty injector with a bad pattern can make one cylinder detonate. . . I'm just sayin . . .
ride to the next couple towns over to the TurboBlue station and put some 102 in it:sinister:
We could be so lucky in Oz to have 102....
I just use a injector cleaner/octane booster every few tanks, just to keep 'er clean.
The octane booster I use says it raises the RON by 7 points - so from 98 Premium to 105!
WOOT WOOT! LOL!
Cheers,
Rick
The octane booster I use says it raises the RON by 7 points - so from 98 Premium to 105!
I've been involved in computer control of gasoline blending systems, and I can promise you that there is no octane booster that will raise your octane by 7 points. Unless it is 100% pure tetraethyl lead. And I'm pretty sure it isn't.