Maybe during the 60s and possibly into the 70s, one brand (can't remember
it) claimed as a major selling point every winter that maybe just their
supreme grade, had gas line antifreeze in it.

Don't get stranded by fuel line freezup.
Protection against fuel line freezing.
With (name) Supreme, you go, or we pay for the tow.

Over the decades, just this small city in western PA has had probably more
than 30 different regional and national gasoline/oil company names in it,
from back in the Cities Service and Esso days.
Now there are maybe 4 different brands (including Sheetz), and almost all of
'em are mini-marts.. and maybe only one (non mini-mart) with lifts, a real
air compressor and maybe a tire changer.
I can think of possibly two that still have attendants that pump gas for the
customers who don't want to pump the gas themselves.

--
WB
..........
metalworking projects
www.kwagmire.com/metal_proj.html


"Andy Asberry" wrote in message
...
I saw an ad tonight on TV. Shell gasoline is now fortified with added
nitrogen.

How is this done, why and how does that keep your engine clean?

And were some BTUs displaced?