No such thing. It all comes from the same place. Just kidding. There has been endless debate throughout the internets over the years. Opinions and objective data vary widely, and have actually changed over the years. I run Shell FWIW because I have one on each corner of the intersection.
Top Tier Gas
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There are a limited number of gasoline distribution pipelines in the US and for the most part they're all shared by all the oil companies. As a result, they all refine their fuels to the same standards and the raw distillation is pretty much undifferentiated by supplier. A huge amount of mixing can't be avoided when each supplier adds their product to what's being pumped down the pipe. At the regional distribution site, when the fuel gets loaded in to a tanker truck for the "last mile" to the gas stations, each oil company adds in their own mixture of additives to brand the fuel that'll be going in to their trucks for their stations and your tank.
You can't be sure of what additives if any are included in the "no name" products, but because the raw fuel is coming from the same pipeline as Mobil and Shell and BP, as far as octane rating it's going to be the same base stock as the name brand stuff...
That being said, I'm immediately suspicious of anything advertised as "top tier" or "grade A" or whatever. I'd be more inclined to buy from a no-name distributor if they called themselves "decent gas, cheap"...
You can't be sure of what additives if any are included in the "no name" products, but because the raw fuel is coming from the same pipeline as Mobil and Shell and BP, as far as octane rating it's going to be the same base stock as the name brand stuff...
That being said, I'm immediately suspicious of anything advertised as "top tier" or "grade A" or whatever. I'd be more inclined to buy from a no-name distributor if they called themselves "decent gas, cheap"...
Top tier fuel just has a specific minimum amount of detergent additives in it (above EPA min standards) to help keep the engine cleaner (e.g. injectors, valves, etc.). You can run any premium with no short term effects. Longer term you may end up with more carbon build up on some engine components than if you were using top tier.
Here's a website that gets into all the details.
toptiergas.com
There's also a link in there showing all the top tier stations if that interests you.
Here's a website that gets into all the details.
About - TOP TIER™
TOP TIER™ is recognized as a high-quality fuel performance specification developed by some of the leading automotive and heavy-duty equipment manufacturers.
toptiergas.com
There's also a link in there showing all the top tier stations if that interests you.
But I’m biased
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Not sure I understand the question. If I understand correctly, the requirements to meet "top tier" were developed by a group of auto manufacturers.
If you are asking which brands of fuel, then look here:
Fuel Stations - TOP TIER™
TOP TIER™ Licensed Brands prominently display the TOP TIER™ logo on the pump, pump handle, canopy or in a station window.
www.toptiergas.com
Probably the best quality, hard to argue that. And I used to only get my gas there. Used to. With the way they have their prices, though, I would rather fill up at Costco while adding some Lucas Octane Booster, then hold my finger up as I drive past a Chevron.
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