When it comes to gas, most of us find the nearest station and fill up on the spot, without much thought. But what about gasoline quality? You might be shocked to know that service stations have ...

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 Motors, BMW, ...

My question is about gasoline. The conventional wisdom I’ve always heard is that brand-name gas (Chevron, Shell, etc.) is better for your engine than what is sold at discount/mom-and-pop gas stations.

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 doesn’t meet Top Tier standard. Can you please ...

Anyone who regularly buys gasoline knows that the prices are constantly shifting, from day to day and from gas station to gas station. But what’s behind the constantly fluctuating prices? Why will one ...