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Date:         Thu, 2 May 2002 12:29:09 -0700
Reply-To:     gary hradek <hradek@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         gary hradek <hradek@YAHOO.COM>
Subject:      Boston Bob's web site
Content-Type: text/plain; charset=us-ascii

Bill, Now I do not recall boston bob say anything about the world being flat, yet. Most engine rebuilders see the worst of what we do to our engines. I agree that 87 octane will work well with our vanagon, however if you advance the engine to get that extra power you should take boston bob's advise and use the higher octane. It may prevent boston bob from seeing your engine quite so soon. gary Date: Thu, 2 May 2002 12:44:09 -0400 From: wb6otg <wb6otg@INTREX.NET> Subject: Re: What Octane Fuel

A stock Vanagon will run fine on regular gas. Some of the information on Boston Bob's web site is just plain wrong.

I think its time to pull this out of the archives and dust it off:

Here's the story on octane: At one time (up til the early '70s?), there were two ways to measure octane, research octane (based on lab work with the fuel) and another system (I forget the name) based on tests in an actual engine. The two systems usually give somewhat different numbers. Most car makers (including VW) specified research octane, often listed as R.O.N. (Research Octane Number?). The US government, in its usual wisdom, decided that since people couldn't agree on a method, they should invent a third one! So, when the government started requiring that octane be marked on the gas pump, it was required that the two existing methods be averaged to come up with a number (the fine print on the sticker even reads (R+M)/2.

So, when VW calls out 91 R.O.N., as the gas flap sticker on my Jetta and the owner's manual for my Vanagon both do, that is the same (more or less) as the US gas pump number of 87, which is the usual number for regular in most areas.

Bill

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