Site News - 11/22 Member of the Year Voting
Date: Tue, 10 Apr 2007 14:37:53 GMT
From: - Bob - <>
Subject: Re: Octane ratings.....what's the truth?

On Sat, 07 Apr 2007 21:43:21 GMT, "Walt Kienzle" <> wrote: > >In North America, the Top Tier initiative ( and >government regulations have nearly eliminated the difference in cleaning >agents among the various grades of fuel for a particular brand. Or looking at in from another direction: The gasoline you use, from any supplier, of any grade, is likely identical. The only difference is the additive package and the octane level. For example, in the Northeastern USA there are two supply lines that bring all gasoline to the region and all vendors share them. The additive package they use is the only differentiator. The Top Tier site makes no documented claims that any fuel supplier is actually using different levels of additives between grades, but only that some fuels have lower levels of "detergent" agents. I would expect that the levels are probably lower, or higher across the line for a given manufacturer. In fact, the US Govt sued (and won) the major suppliers a couple years ago to stop them from inferring that higher octane gas was in any way better for your engine - aside from the advantages of higher octane. It's an interesting list: If this was published more, we might see more suppliers on it.

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