The BEST Top Tier Gas For Our Cars

[Jasper]

Originally Posted by x808drifter

That is almost certainly not what is going on in the Costco case.
All the fuel from refineries are pretty much the same. The different companies add their own additive/detergent mix at the end.

Part of the trucks load was probably High or low grade for Shell the other part was for Costco with their additive blend.

I also could not find any mention or article of gas stations buying old gas.

Edit:
I also use Costco.
80 cents cheaper per gallon vs everywhere else.
Zero disenable difference in MPG/Feel between any of the brands.

Next time I see a gas truck at a Costco I’ll ask him what other stations share the same gas. But you’re right, I’ve read somewhere all gasoline comes from the same local source- just some sketchy stations serve old/diluted gas.

[LancePower]

I've seen Costco listed as a Top Tier provider. So this is not surprising.

[why?]

There is a website, toptiergas.com I use costco because of the price, but BP works best for me. The entire point of top tier gas is about the additive package.