This has probably been talked about before but I feel its an important topic.
Where should I buy gas? Who has the cleanest, and best performing fuel?
I ask this as I had a fuel gauge problem and after using BP fuel it is no longer faulty. Also my mother's Touareg has flashed an engine light, she usually uses Kroger and Sam's fuel but since switching and using BP or Shell it has not been an issue.
I've heard all sorts of things about which company to use but I would like to hear everyones opinion and backed up why.
Super America/Speedway is what I had been using.
I had heard things but had never experienced such. I have to run 93 and the 10 cent increments on the fuel is appealing.
Until now I would've have said it doesn't matter. Maybe I'm wrong.
I've been using Mobil/Exxon primarily. Nothing like CEL or something ever happened using different gas, but I do notice I get noticeable less mileage on BP. All 93 also.
In Canada I have to use Petro Canada/Sunoco, since they are the only 94 around(running chipped 2.0T, I could run 91 tune though if I need to).
Is there anyone who has some solid facts? Maybe someone who works with or around one or more of these companies?
If you are using a major brand (i.e. Exxon, Shell, Chevron, BP) the brand doesn't really matter. It's when you start getting into the cheap variations is where you can notice a change in the performance of the engine.
Typically the base formulation for gas is the same across the board, like another poster said, it's the additives that separate the pack. Like you may know, the additives are designed to help the engine run cleaner, prevent buildups, and overall perform better. If you are buying a cheaper or no-name brand gas, then you are not likely getting any additives into the gasoline formulation. There is no reason this would be bad, but you don't get the R&D behind the additives that should help do what they claim to do.
How it usually works is there is a distribution service that has the base gasoline in two octane ratiings (e.g. 87 and 91). The truck that picks up the load will be delivering to a single brand of station, so lets say Texaco. The truck will be filled with the appropriate octance gasoline for the delivery to a certain point, and then the proprietary additives (Techron) will be added into the truck within a tolerance spec range. The theory is that the turbulence created by driving will be enough to thoroughly mix the gasoline with the additives.
Now, where it can get tricky is if the truck is delivering mid-grade gas. The truck driver needs to know how much gas is left in his tank and what grade gas it is. Then he has to figure out how much of the low grade (87) and high grade (91) it would take to roughly average the mid-grade (89) on top of any remaining gas in the tank. Then he has to do the prioprietary additives as well. To me, there is no benefit of mid-grade and I would just avoid it altogether.
I used to only run Sunoco 94 in my SVTF because I thought it was the best. Then one day I had to fill up at a Marathon station with their 93 and noticed the car felt much smoother and seemed to run better. I also average about 2mpg more. I switched back and fourth a few times when I would do long drives on the highway to keep it similar and found that the numbers backed up what I was feeling. I've since used Marathon fuels almost exclusively. There's a good chance that on my old BMW I won't notice a difference at all, but I try to keep it consistent.
Last edited by B3passatBMX; 05-30-2012 at 03:15 PM.
Next is the driver of the truck/trailer doesn't figure out how to mix mid grade. The normal petroleum trailer has 4-5 compartments and no good way to figure out how much has been drained out (best system is a stick that he can put in a tank). I have always seen it put in the trailer compartment as midgrade or it is mixed at the pump as it goes in your car. That is why Sunoco can offer like 5 grades of gas.
The additives are also injected as the trailer is loaded.
Shell V-power ONLY, I've actually planned road trips knowing where the Shell stations are
Because after using only V-power for three years in three different cars, it really does make a difference IMO
I'm not a serious person, I don't get up in the morning and think 'lets have a really serious day today', I usually think 'lets have a bit of a laugh'" - Jezza
SG E46 M3 -
DBP MkIV .:R - Gone but not forgotten
I've been driving for 10 years across somewhere around 15 cars, and not once have i put anything into my tank but Chevron 91.
personal preference sure, but theres no way i would use the bargain brands on my cars. im sure shell and 76 are perfectly fine too, but chevron 91 is all that goes in my tanks!
i only use one of two
CHEVRON or 76/Conoco Phillips
EDIT: i just checked and its been a while since i last used 76/CP , only because there's a very convenient Chevron right of the freeday on my way to work, that gets lots of Trucks through it, so in theory fuel is always fresh there.
but when traveling outside of my normal route, nothing but 76/CP or Chevron
Last edited by romanl; 05-30-2012 at 03:51 PM.