1 By then, it might be too late—engine damage has already been done. TOP TIER TM gasoline brands meet stricter standards of having higher levels of gas detergent additives that provide more ...

Top Tier gasoline contains more effective detergents than federally required, which helps clean fuel injectors and reduce harmful carbon deposits inside the engine.

A car stands as one of the most significant investments an individual can make, second perhaps only to their housing. It’s a necessity in most areas of the U.S. However, unlike homes, vehicles ...

Q: Neither my husband nor I understood your reply in our paper recently. We both use Citgo 87 and the stations we go to state “Top Tier.” You said Citgo ...