I just joined Costco and was considering filling up there. Wanted to run it by the forum to see if anyone ever had issues with using Costco gasoline? I know it is Top Tier, whereas Sam's Club gasoline is not. How does it compare with other brands?

I searched the forum for information on it but the only recent posts were comments on the price and not the quality.

 

Top tier is all you need to know.

 

Costco is on the list. Here it is updated for July 2020.
Here Are the Top Tier Licensed Retail Brands in the United States:
76
ARCO
Aloha
Amoco
BP
Beacon
Break Time C Stores
Breakaway
CITGO
Cenex
Chevron
Conoco
Costco Wholesale
CountryMark
CountryMark PLUS
Diamond Shamrock
Express Mart
Exxon
Fast Fuel
HFN – Hawaii Fueling Network
Harmons Fuel Stop
Hele
Holiday
Irving Oil
Kirkland Signature Gasoline
Kwik Star
Kwik Trip
MFA Oil
Marathon
Metro Petro
Mobil
Ohana Fuels
Phillips 66
QT
QuikTrip
Ranger
Ranger Fuel
Ranger Mustang
Ranger Stallion
Ranger Thoroughbred
Reeder’s
Road Ranger
Rutter’s
Shamrock
Shell
Simonson Station Stores
Sinclair
Texaco
Tobacco Outlet Plus Grocery
Valero
Value America
WOW
Win Win

 

Gee....there can't be many brands then in the bottom tier....

 

I wonder where the big truck stops fit in like flying j...pilot...loves...petro...etc.....they haul their own fuel but where does it come from....i know i use costco for my str and really like it....i also have a loves and flying j in town and notice a drop in mileage and performance when using them...so they are no longer used

 

Been using Costco gas since day #1 with the SVR. No problems at all...

 

Ha! This is almost as big a can of worms as discussing motor oil or politics! It definitely qualifies as Top Tier, and I've used plenty of it in the past. That said, I typically run Chevron Supreme in my cars that call for premium gasoline. Would I use another Top Tier brand in a pinch? Sure, but Chevron is the steady diet for my forced induction cars.

 

I use Costco with no problems while being tuned by VAP and now with a Race chip. Have not experienced any knock or pings. I do however get 20-30 more miles per tank when using Shell or Mobil.

 

Since most fuel is distributed via pipelines and out of public terminals the gasoline is all the same. The difference is in the additives injected at the truck loading rack. Top tier fuel has to meet minimum additive specs. That doesn’t mean that some brands don’t offer an additive package that far exceeds the minimum specs.

 

I've used Costco gas for 3 years in my cat, no issues at all. (usually cheaper than competitors)

 

I find there is always a long line at my local Costco gas station. Why would I waste my time lining up to save few $?

 

Aww Jeez, riding MOTORCYCLES, talking 5 gallons max, my Harley Dumbison riding buddy INSISTED on saving ten cents a gallon by finding the cheapest regular. Would circle around LOOKING for a two dollar savings and expect me to follow him. I didn't EVEN tell him about GasBuddy.

I'd go across the street to Chevron and pay as much as a buck more per gallon more HOPING not to have clogged fuel injectors down the road.

FWIW saw $1.98 regular here in Phoenix today. What's everyone else seeing?

 

Around my area it can pay off to look around. I saw 3.89 for premium today, and another gas station with 3.09 (albeit not top tier).

 

The OEM car runs fine with 93 octane. Any additional mods (tune etc) will require a consistent QUALITY 93 octane fuel and it's even better to run higher (95) for you VelocityAP stage 2 guys out there. North America measure of Octane*

 

Agreed. A lot of people don’t realize this. The biggest differentiator is the small amount of additive packs the different companies add.

 

I can't recall the federal code and I'm too lazy to look it up right now, but, federal law requires that all gasoline be of the same quality and chemical make up so the fuel can be used in any passenger vehicle. Perceived differences are based on personal use and driving habits. If you were to consistently use the most recognizable brand (#1 top tier) and you were out on a road trip, about to run out of gas and the only gas station you found was at the absolute bottom tier, that gas, by law, must meet federal requirements for use in passenger vehicles.

It's all about marketing and getting in front of the customers eyes.

Nay sayers can fuss and fume all you want, but there literally is no difference in brands of gasoline. Think about it, would you produce inferior fuel to undercut the competitors in hopes of moving up the ladder with lower prices?

It's all about the size of the marketing budget and the willingness to promote

 

We have been using COSTCO gas in a 2006 XJ8L and 3 other cars since 2006 - no problems whatsoever

 

Ditto, Ditto, Ditto!...when I'm not filling with Costco, I'm filling with Sam's Club. All of my vehicles, nary a problem ever.

 

Been using it for 8 years. No problems at all.

 

I’ve been using Costco gas for over 20 years with no problems ever. Everything from my 2009 XK with 32,000 miles to BMW’s, MB, Mini Coopers and Subaru’s, etc.. No hiccups.