Why Top Tier Gas Is Helpful and How to Find It Carbon buildup became a bigger issue with the advent of fuel injection (which replaced carburetors) during the 1980s.

Top Tier gas is held to a higher standard through the voluntary agreement of major gas brands. You can find it at stations from Exxon, Mobil, Chevron, Shell and Costco.

TOP TIER™ gas is gasoline (and also diesel fuel when applicable) that has been certified to meet specific performance standards. A group of automakers — Volkswagen, Toyota, Honda, General ...

With gas costing more than $3 a gallon, it’s no wonder drivers look for the cheapest station. But, auto experts said using Top Tier gas is worth it in the long run, even if it costs a few ...

An analysis by AAA reveals that gas with detergent additives can keep an engine running smoothlyBy Jeff S. BartlettNot all gasoline is created equal. There’s plain old regular, and then there’s ...

Costco offers Top Tier gasoline with higher levels of required detergents; however, Sam’s Club does not. Continued fuel use without the Top Tier additive package could result in 2% to 4% lower ...

Top Tier’s website maintains a list of gas retailers that are certified retailers of the Top Tier gasoline standard. This list includes big national brands like Exxon and Shell, but also ...

Each gas brand uses its own blend of additives that distinguishes its fuel from other brands. These additives can affect the quality of the gas. Author: Emery Winter Published: 3:22 PM CDT ...

Each gas brand uses its own blend of additives that distinguishes its fuel from other brands. These additives can affect the quality of the gas.

Each gas brand uses its own blend of additives that distinguishes its fuel from other brands. These additives can affect the quality of the gas.