Type and quality of gasoline brands
Originally Posted by JForestZ34
The old Exxon Refinery in linden is now Conoco Phillips.
James
James
I haven't seen a citgo here in Tennessee in a while. I personally use Exxon, because, like said, I did milage tests on them and it came out to be the best around here. BP/Ameco was the worst. By the way Racetrack or any others of that sort that sell gas 2 or 3 cents cheaper aren't any good either. The reason for this was explained to me by one of my professors that use to work for Texaco as an engineer. He said that what they do is buy the left over gas at the filling stations for the trucks, and just mix all of the brands together, which some of the different additives don't mix well with each other, thus the reason why I got 2 to 3 miles less on a gallon the 3 times I filled up there.
Also, if your truck is not tuned for 93, save your self some money and just get 87 and not any higher. The octane ratings are only stand for how well they resist detination. For example, if you have a engine that has a compression ratio of 9:1 87 will not pre-ignite from the pressure. But if you raise the ration to 10:1 then 87 will detinate before the piston gets to the proper position for it to be ignited by the spark plug. Therefore that would require, you guessed it, higher octane rated fuel. Its amazing how many people think that higher octane means better gas.
Also, if your truck is not tuned for 93, save your self some money and just get 87 and not any higher. The octane ratings are only stand for how well they resist detination. For example, if you have a engine that has a compression ratio of 9:1 87 will not pre-ignite from the pressure. But if you raise the ration to 10:1 then 87 will detinate before the piston gets to the proper position for it to be ignited by the spark plug. Therefore that would require, you guessed it, higher octane rated fuel. Its amazing how many people think that higher octane means better gas.
I have to agree about running 87 octain as long as you are running stock or close to it, if that is what the manufacture calls for.
You don't get more power and you loose MPG if you run a higher octain gas than you need.
I leaned this first hand. Where I live there are several stations, that sell the 89 octain at the same price as the 87 octain. So I always bought the 89 figuring that I'd get better performance.
Well I learned that that was wrong first hand.
I had to take a trip for a weekend that was approximatly 300 miles both ways. I filled up with my normal 89 octain on the way out of town. Since I was close to E I filled up almost as soon as I arrived at my destination. I'd gotten just over 16 MPG on the 89 on the way down.
But the gas stations where I was charged more for the higher octain fuel. So being the cheap bastard that I am. I got the 87 octain gas.
Anyway I drove about 20 miles in town before getting back on the road to head back home.
Upon arriving back home, I filled up and discoved I'd gotten over 17 MPG on the 87 octain on the way back. Keep in mind that that also included some city driving.
I've been running 87 octain ever since and my average MPG is now consistantly better than it was when I ran 89 octain. Also I can't feel any difference in performance.
Doug
You don't get more power and you loose MPG if you run a higher octain gas than you need.
I leaned this first hand. Where I live there are several stations, that sell the 89 octain at the same price as the 87 octain. So I always bought the 89 figuring that I'd get better performance.
Well I learned that that was wrong first hand.
I had to take a trip for a weekend that was approximatly 300 miles both ways. I filled up with my normal 89 octain on the way out of town. Since I was close to E I filled up almost as soon as I arrived at my destination. I'd gotten just over 16 MPG on the 89 on the way down.
But the gas stations where I was charged more for the higher octain fuel. So being the cheap bastard that I am. I got the 87 octain gas.
Anyway I drove about 20 miles in town before getting back on the road to head back home.
Upon arriving back home, I filled up and discoved I'd gotten over 17 MPG on the 87 octain on the way back. Keep in mind that that also included some city driving.
I've been running 87 octain ever since and my average MPG is now consistantly better than it was when I ran 89 octain. Also I can't feel any difference in performance.
Doug
Originally Posted by DDan1967
I've been running 87 octain ever since and my average MPG is now consistantly better than it was when I ran 89 octain. Also I can't feel any difference in performance.
Doug


