Quote:
Originally Posted by bobb169
Used Costco gas for to many years I don't remember how many in all my vehicles.....no ill effects.
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No immediate ill effects for me, just didn't know what I was missing until I put some Shell in it, then an immediate performance improvement.
Like a frog slowly heated water you might say.
From what I've read there is no such thing as Costco gas, every few weeks a different supplier.
2016
https://www.mustang6g.com/forums/threads/costco-gas.69569/
Quote:
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1. Costco does use several kinds of gas according to the load. I was privy to information by a Costco employee and he pulled out his clipboard and told me the last load was from Exxon, but he said they use, Chevron, Shell and Exxon for the most part, not much else.
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Costco is fine in my wife's Chevy Cruze, but it's never going in my Porsche again.
Life is to short for mediocrity.
Read post #4 (2016)
http://forums.pelicanparts.com/porsche-911-technical-forum/897373-costco-gas-issues-burnt-valves.html#post8944447
Quote:
Originally Posted by Iciclehead
Having been in the downstream retailing industry and speaking from experience.....there is a difference between the gas that Shell delivers to Costco versus what they deliver to their own branded station.
The base feedstock is the same, it comes with a very basic additive package, and chances are that is what you get when you go to Costco. The different grades/formulations are held inside a different compartment in the truck so even though a Shell truck delivers it, almost certainly it is not the same product as you buy at a branded station.
The additives are injected at the depot and yes, they do make a difference to engine life, engine deposits and so forth.
Personally, I NEVER buy gas from anything but one of the majors (Shell, Exxon, Chevron etc) as their additive packages are pretty close to equivalent and likely as good as you can get for your engine.
Third parties....who knows.
Dennis
T
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2015
http://forums.pelicanparts.com/off-topic-discussions/877397-gas-quality-question.html
Quote:
Originally Posted by rusnak
Costco only now was deemed to be a major oil company, based on their sales.
Until now, there were zero detergents and no additives. Just the cheapest gas available.
But since their volume makes them an oil company, they must fire in the additives, at least in California. But, rather than buying it already mixed into the gas, they are mixing it on site at each Costco store.
Would I buy Costco gas?
Not if there was any other gas available. Especially if you have a nice car.
Gas is NOT THE SAME, across brands.
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The quotes from the Pelican Parts forum are only 4-5 years old, apparently Costco wasn't able to purge our forum.
Costco said they had the best gas back in 2009 too I bet, no unnecessary detergents just pure gas. Now it's their claim of 5X's more detergents than required, that sounds just as bad.
Do the Shell dare, try just one tank full and if you cannot tell a difference never go back - they are the most expensive anyway, and you just want cheap, right?