It's hard to assure Top Tier gas is better than others

Q: Recently you said there was no difference between Shell, Exxon, and other gasoline brands. In fact, there is a big difference. Shell V-Power is a Top Tier product. It has four times the additives to keep the throttle body and fuel injectors cleaner. Bob Kalb, Salisbury Township Your recent story on the cheapest gasoline rings true. Of course, there are claims made by the auto makers that not all gasoline is created equally.