Top Tier Gas? - Mercedes-Benz Forum

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post #1 of 43 (permalink) Old 07-05-2007, 10:01 PM Thread Starter
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Top Tier Gas?

I've been doing research on the best gas & it appears as though I've been using inferior gas for my cars.

I had been using Exxon 93 premium for years (I own Exxon stock) but it looks like Chevron & Shell are the best:

Top Tier Gasoline



TOP TIER Detergent Gasoline Retailers

Gasoline retailers must meet the high TOP TIER standards with all grades of gasoline to be approved by the automakers as providing TOP TIER Detergent Gasoline.

In addition, all gasoline outlets carrying the brand of the approved retailer must meet the TOP TIER standards.

Additional gasoline retailers are added to the TOP TIER list as they meet the standards. The retailers known to be on the TOP TIER list are shown below.

TOP TIER Gasoline Retailers:

QuikTrip
Chevron
Conoco
Phillips
76
Shell
Entec Stations
MFA Oil Company
Kwik Trip/Kwik Star
The Somerset Refinery, Inc.
Chevron-Canada
Aloha Petroleum
Tri-Par Oil Company
Shell-Canada
Texaco
Petro-Canada
Sunoco-Canada


Looks like I'll be using Chevron from here on out. I never had any problems with Exxon, but if they don't make the list...

What gas do U guys use?
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post #2 of 43 (permalink) Old 07-05-2007, 10:09 PM
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I only use Shell 93 in both the 6 and V8s. Never had a single injector problem.

As much as I dislike Exxon for other reasons, I can't imagine that they are not considered a top tier gas producer. Worth some research time.

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post #3 of 43 (permalink) Old 07-05-2007, 10:36 PM Thread Starter
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I understand your dislike of Exxon. But I ass-u-med they were one of the top tier companies also. I get the feeling most people on here use Chevron or Shell...
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post #4 of 43 (permalink) Old 07-05-2007, 10:44 PM
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and they don't even have bp on the list either, and i know for a fact that bp gasoline along with exxon are better then a good portion of that list.
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post #5 of 43 (permalink) Old 07-05-2007, 11:26 PM
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I've refused to buy Exxon-Mobil/LukOil after hearing about their ridiculous profit postings on top of the high prices.

They're still the highest in my neighborhood, and NJ's known for the cheapest gas in the tri-state.

Isn't Hess up there? I thought Hess was top tier.

And what about Valero, does any one know about Valero?
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post #6 of 43 (permalink) Old 07-06-2007, 02:47 AM
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I use BP 98 octane here.
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post #7 of 43 (permalink) Old 07-06-2007, 08:42 AM
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wow, i have never seen 98 octane in the us, it usually ranges from 91 to 93, depending on the state, and i have seen 95 but very rarely. i fill with bp too, but usually is 92 or 93 octane, depending on the state.
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post #8 of 43 (permalink) Old 07-06-2007, 11:37 AM
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The reason European fuels have higher octane ratings is they use a different formula to determine the rating. Here in the US we use the following formula:
(RON + MON) / 2

In most places around the world (including Europe and Australia), the Research Octane Number (RON) is what’s posted on the pump. There is a second rating called the Motor Octane Number. Both numbers are determined using a variable compression engine, but the MON uses heated fuel, the engine is run at a higher RPM, and the ignition timing is adjusted during the test. The MON is always eight to ten points lower than the RON.

This means the exact same 98 octane gallon of UK fuel, is rated at 93 or 94 octane in the U.S.
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post #9 of 43 (permalink) Old 07-06-2007, 12:45 PM
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Sam's club 93 octane here
post #10 of 43 (permalink) Old 07-06-2007, 01:06 PM
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I refuse to use anything other than Chevron Supreme 93 octane in all of my cars. In a pinch, I'd be willing to use Texaco also. So far, I have never had a problem with any injectors, intake/exhaust valves, combustion chambers, etc. I also follow a strict regimen of adding a bottle of their Techron Concentrate at least every 3000 miles.

I also think Exxon/Mobil and BP/Amoco should be considered "top tier" gasoline, and I have heard good things about Citgo (forget that silly boycott trying to hurt Hugo Chavez and Venezuela).

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