Quote:
Originally Posted by Carl in Tampa
2. You might want to re-visit your car dealer's advice about only using Shell gas. That might have been in the era when Shell was one of the last brands to introduce ethanol into their gas. Gas without ethanol provided more power and was less likely to damage components of your engine. Alas, those days are over, Shell has 10% ethanol like all the others and is often more expensive per gallon than competitors.
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Shell is a top tier gas station rated by auto manufactures. Google "top tier gasoline" and you'll get the whole story. What it boils down to is the auto manufactures, GM, Ford, BMW, etc. recommend gas with detergents to keep your engine, valves especially clean. Additives put in gasoline leaves residue that builds up. Those companies that pass the tests, which cost them up to $30k would be rated a top tier company providing that the amount of detergents they use will be found in all their stations that they operate and in all grades of gas they sell.
In this area BP, Chevron, Exxon, Mobil, Shell, and Texaco are all top tier gasoline. Popular stations here that are not are Sunoco, Marathon, Citgo, Hess and Kangaroo unless some have tested OK since I last checked.
I always try to buy from top tier stations since it is usually the same price or only a few pennys more.