I had a mazda RX7 years ago.
I noticed that if I used a name brand over a mom and pop brand, my car ran smoother, and i did notice a boost in performance as well as a difference in mileage.
Although I do agree with you about there being one gasoline and different additives from different sources.
Can it also be that some of the additives actually run cleaner which produces a bit more power? After all, if chevrons techron keeps the valvetrain cleaner, it would then make sense that it would produce more power because of less friction, and deposits.
just a thought...

 

The carbon build-up in the combustion chamber increases the chance of detonation and your ecu will counteract that by retarding ignition timing which will result in power loss.

 

correct, so by saying that you will have more performance with better gasoline is a true statement then.

 

^and for the last time, it does matter what gas you put in your car then, forget what the NAYSAYERS say!!! keep on motoring!!!

 

The additives are long-term things, there is no way a different additive package is going to make a car run better from tank to tank. The additives have nothing to do with "friction". Perhaps after 20K miles, the engine will be slightly cleaner with a different additive package, but it's not going to run better the first time you switch to a gasoline with a different additive package, anymore than thinking the car is running better because you change the brand of motor oil you use.

All cars seem to run better after a wash. Sorry, but people's perception about how well their car is running is extremely subjective and is subject to all kinds of interfering "noise" (weather, humidity, ambient pressure, traffic, etc.) that make subjective judgements extremely unreliable. All the objective data says that gasoline from the same area and time of year is the same from all the brands, except for very minor differences in the additive packages which can't possibly affect the day-to-day running of the car. Those are the facts.

- Mark

 

just found this.... save 5 cents a gallon at Shell thru June. http://www.shell.us/home/content/usa...aver_card.html

 

so that means waxing my car before the "big race" was a waste of time

 

sure it did, we're talking wind resistance now.

You no doubt made your Mini .0007% 'slicker' but I'm sure you felt 200% better looking at your baby lookin' oh so fine

 

ahhh so true!

 

so if someone keeps putting fuel with "better" additives than another that puts "cheap" fuel, in the long run as stated above about 20K miles, there will be some sort of a difference

thats why i keep using shell all the time and not any "other" brands unless i have too, so the long term effects will benefit my car

 

ABSA$%#^&*LUTELY!

 

There may be. There may not. There isn't much data around.

And you can make a strong case that even if there is a difference, you can probably do better burning the cheap gas and running a bottle of Techron through the fuel system every oil change.

This is like discussing oil - lots of preconceptions and theories - almost no good data and what data we have tends to support the idea that it really doesn't make any difference.

- Mark

 

I used to run a bottle of the Techron concentrate (not the regular strength) on every oil change on my BMW. It was good stuff.

 

When I first got my 06 MCS I was using Citgo. Car would start up and on some occasions just die. My car was only a couple months old at the time so I went and had my fuel in my tank checked out. It turned out that the Citgo fuel I was using had to high of a alcohol mixture. I was told to use either Shell or Mobil. Since switching never had the problem again. Shell and Mobil are both great fuels but I have noticed that my car seems to perform better on Mobil.