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i can swear i remember seeing gas gauges that said premium unleaded only instead of unleaded fuel only
can anyone confirm this, my search on here and on yahoo turned up nothing
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AFAIK, The TPI cars recommended (but did not require) Pemium... Actually if you do not hammer on the car to where you get spark knock, I have found that you actually get better milage from Regular, apparently there is more energy.
John
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The 87 L98 gauge only says Unleaded Fuel Only on it. Premium fuel requires a higher temperature to burn all the fuel. Todays Premium vs. yesterdays Premium may be different and the computer needs to be calibrated accordingly. If the fuel isn't burning the most efficient, then it becomes waste out the tail pipe. Sounds like the Regular is burning more efficiently so you are getting better mileage.
well i messed up last tank and filled up with midgrade.
got a nasty reminder when i floored it to merge onto the highway
(i love flooring this car so much, i dont need to, but hey, its a camaro lol)
that was a bit of a scare, it started knocking and pinging so bad...
needless to say, i use premium.
That is just the thing, The higher the octane the slower it burns and the cooler it burns. So you can advance the timing to get better power. The down side is the fuel is not as efficient so you get worse fuel economy. In short, if you want performance, get premium, if you want economy get Regular. I would never get anything less than 87 Octane hoever I remember some gas stations had an economy 86... At the time I owned a 1977 Buick Electra LTD that with 86 Octane would spark knock at 55 Mph going up a hill on the expressway... If I traveled at 65 it would almost constantly spark knock...
The 87 L98 gauge only says Unleaded Fuel Only on it. Premium fuel requires a higher temperature to burn all the fuel. Todays Premium vs. yesterdays Premium may be different and the computer needs to be calibrated accordingly. If the fuel isn't burning the most efficient, then it becomes waste out the tail pipe. Sounds like the Regular is burning more efficiently so you are getting better mileage.
Never noticed that before. I have it on my 87. But none of the others I've seen do.
