Please dont hold this question against me.....I run Shell or Cheveron (91) in my 07 coupe now, and was looking for your experince (if) you have run or are running Costco 91 oct...Is their gas to be avoided ? Thanks.

 

it will be fine lol. I have never felt a difference from tank to tank with any company.

 

ran costco gas for entire 5 years of my cars life. It's at almost 100k right now and getting 26 mpg on freeway.

I don't see any prollems with running costco gas, It's all same **** anyways

 

Is shell's gas really good? It says it cleans out your tank or whatever.

Would it be betetr to just get 100% gas or start using shell's gas, which isnt 100% but it "keeps your gas tank clean"

 

Gas is gas, it comes from the same place.

 

Not entireley true, yes it comes from the same place but each company adds their own additive package which vary greatly.

http://www.toptiergas.com/

 

Not even remotely true.
Other than the fact that it all starts out as crude. After that though...

OP, Costco Gas is fine, so is Sam's club.
My Trans-Am would labor knock up a hill on anything less than premium, but even on premium from certain stations (for example, a local PAN, and a Petro)

However, it never had this problem when running premium from Sam's or Costco.

 

I honestly Only Use Sam's Club or Costco.

 

I use Costco gas all the time in my vehicles.

 

interesting u guys have 91 octane here its either 87, 89, or 92.

 

big lines for costco gas every where..

I'm one to never you costco gas or anything similar to them.

shell, 76 and Chevron for me only.

 

Works fine for me.

 

parents have used costco since they started offering gas. works great in their cars

 

Costco is the best around here... only place for miles and miles that serves pure gas (no ethanol added). 93 octane, btw.

 

+1

I am a Regional Manager for a Security Trucking Logistics Company. I can tell you that not all fuel is the same.

Never had an issue with Costco.

All gas is not equal but all gas does have to measure to minimum specs per law (the clean air act is a major component but there is also state and federal law too). This is the minimum quality for sale.

Frequently colors are added. Detergents, additives, preservatives, etc. These are based on the specs of the gas ordered by the customer.

As to using a higher grade of gas. Consult your owners manual (esp for turbos and supers).

I'M NOT A MECHANIC SO DO NOT CONSIDER THIS PROFESSIONAL ADVICE ON THE PROPER MAINTENANCE OF YOUR VEHICLE

http://www.faqs.org/faqs/autos/gasoline-faq/part2/