On Thu, 31 Mar 2011 10:31:53 -0400, Kurt Ullman
wrote:

In article ,
"Stormin Mormon" wrote:

The mileage on my replacement Blazer is a bit low.
15 MPG, where the last Blazer ran about 18 MPG.

A friend reccomended Berryman's B-12 gas additive.
Says it's $2.97 at Walmart. Found it at Walmart. top
shelf, and this store had only two left, so it took a
while to find it. A couple days ago, I put in one can
of that B-12 fluid. I'd checked my mileage at 15.2 on
the last tank. This next fill up came up 16.3 MPG. I
don't think I changed my driving style, and the weather
is much the same. So, I'm figure that fluid did some
good.

It may work for you, also.

Report back over 10 or more tankfuls. Too many variables since where
you are going, the weather, and even differences in traffic patterns can
make fairly large differences from one tank to another. Sounds
interesting, though.
There are at least 12 products (for gasoline) sold under the
Berryman's B12 name - but all but the stabil clone are primarily fuel
sydtem cleaners. My guess is primarily xylene.