Originally Posted by cbetts (Post 85678)

To be honest, I will NEVER buy the low-end gasoline ever again. I had a '96 Chevy S-10 with the 4.3L Vortec and all I ever ran in it was Chevron low end. About every three to four months, I would have two bad fuel injectors just out of the blue. Couple more months, couple more injectors. I finally did some research and found out it had to do the the refinery. The put an additive in the crude oil to allow it to flow easier in the pipes. This substance has similar characteristics to sugar; when it is hot it flows nice but when it cools off, it will crystallize. Apparently, the mystery substance is not fully processed out of the lower level fuel. When I switched to mid-grade, all my problems disappeared.

When I go off-roading at higher altitudes (>10,000 ft), I will top-off with the high end fuel. I never had it ping, but I think I get a little more umph when climbing in the thin air.

Originally Posted by Born Champ (Post 351471)

We arent asking about your Chevy. This is a hummer thread.