I don't know anything about Chevron products but up here in Western
Canada Chryslers and Shell didn't get along for a while, What ever
was in Shell fuel ate away at fuel gauge sending units causing them
to behave erratically as in bouncing from accurate to empty over and
over every few seconds. Each cycle was accompanied by the low fuel
warning bong. It could drive you crazy. I had mine replaced  under
warranty and stopped using Shell gas.  Seem to remember a class
action suit against Shell.  Didn't have a Vanagon then but I still
don't use Shell products.
On 31-Jan-07, at 10:26 AM, Automatic digest processor wrote:

> Date:    Wed, 31 Jan 2007 09:21:30 -0800
> From:    Markus Mumper <markusmumper@GMAIL.COM>
> Subject: Re: LVC Re: Long, Big Rant about a Crappy VW Dealership
>
> Screwy things here too.
>
> My wife drives a Passat 4 Motion (The Piss Ant). The car was towed
> to the
> San Luis Obispo VW dealership several times during the warranty period
> because the car would not start. They replaced a couple of coils
> and, I
> think, a drive shaft sensor. BUT, they blamed the problems on my
> wife's use
> of Chevron gasoline!
>
> Funny thing, now my wife NEVER uses Chevron gasoline and the car
> has not
> exhibited any problems since. They said Chevy's had the same issues.
>
> Markus and (RVC) The Girl ("87 Westy)