First off, had a 70 F250 Ford pickup with a camper on it. 360 V8 2 barrel, 4 speed, 7 mpg. Went through 3 engines, one every 125,000 miles, when I rebuilt the first and second one, my valves looked like that. At 125k the engine would drink oil and blow smoke, so if the Shell ad portriats that valve, it has to be one whooped engine, but this is old iron block technology.
Second, it has been said that we only get 4 sources for gasoline, isnt there some giant gas lines that trasport the nations fuel around America. I understand that cheap gas is less filtered and has less cleaners and additives. As far as I can think, this nitrogen enrichment is just a fancy fuel cleaner?
Third, I ran my last 2 tanks of Shells new nitrogen enriched fuel and have seen nothing in the way of increase or decrease in fuel economy. I just figure Im getting the added benefit of not having to stop at Auto Zone and buy fuel system cleaner.
Yes, the raw gasoline is transported through the same pipelines throughout the country, but the additive package is added when the fuel truck is filled to go out to your local filling station. The additives do not go through the pipeline.
I just tried a tank of the "nitrogen enriched " Shell when I was over in Vermont. Didn't seem to do anything for my gas usage. I guess you have to run a couple of tanks of it to make sure you are running it straight without any other gas to give it a fair review. I am unable to do that as there are no Shell stations in Upstate NY. I tried anyway.