Don't ignore his post. I first notice the same on my 2000 Navigator back in 2004. When using any other gasoline I'd get about 380 miles per tank. When using shell Vpower I'd get around 420. It was very easy to notice the immediate difference because for the first time ever the truck got over 400 miles on a single tank. This absolute fact I've tested many times in my own vehicle over the years.

Before some doubts it or calls BS. Try it yourself, it's ridiculously easy to prove true. Fill your tank with whatever, hit the trip reset and record the milage. Do the exact same after filling with Vpower. I'd bet you see a small 5-10% in overall milage.

 

10 CENTS!!! Get the Shell CitiBank Mastercard... It's 5% on EVERY GALLON!

So for $4.00 a gallon your lookin at $0.20 Good times

 

Still looking for a link to the original article, so we can read the full report.
Thanks.

 

Found the articles:

http://www.detnews.com/article/20110...in-gas-quality

and a slightly different (better) version-
http://www.wcpo.com/dpp/news/local_n...t-major-brands

There are a couple of things that don't seem quite right in the articles-

First, the Unwashed Gum Test measures the quantity of additives, not the quality. That's mentioned, and I wouldn't worry about it because the car makers use that test themselves to check gas. However...

They rate BP regular as being high in additives, but it's unclear if BP regular meets Top Tier specs the last time I looked at their websites. And they show Mobil as being low in additives, even though Mobil does meet Top Tier specs.

All of that makes me suspect that the Top Tier specs govern the effectiveness of additives, not the quantity; and maybe the quantity doesn't mean a lot?

Further discussion?

 

Yes, top tier refers to performance of the additives, not quantity. You must achieve very low levels of deposits throughout the engine (injectors, valves, manifolds, pistons) as demonstrated by engine testing. Quantity of additves has nothing to do with it. There's just one question. How many grams of deposits are there in the test engine when you tear it down after a long, engine test cell run. To be top tier, that answer must be "not many".

This has been an encouraging thread because it shows that most are aware that all gas is not the same. So often, the various “know it alls” bellow and bray that all gas comes out of the same pipe because they have a buddy who has a buddy who heard of a buddy who drives a gas delivery truck, and by good golly, they know. Certain aspects of such statements are true in some areas of the country. If you are in an area served by common carrier pipeline (as opposed to company owned pipeline or ships/barges) the base gasoline for all brands may indeed all come from that common carrier pipeline. And there’s even one step further that may be true in such situations. All grocery store, bargain, and off brand gas in such areas may be exactly the same because it may have the same, poor to mediocre, standard additive package (ie, not top tier). But even in such common carrier situations, the branded, top tier majors use their own additive packages. So it is never true to say that Shell/Exxon and other top tier gas is exactly the same as bargain brands. At the very least, the top tier additive packages are different. And in many of the major metro areas of the country, especially close to big refining centers like Houston, LA, Chicago, etc, or close to the coast for ship/barge transport, not only are the additive packages different, the gas itself comes from that brand’s refineries and quality control, not just the additive package. So bottom line, as with most things in life, you get what you pay for.