General ⁠Motors is investing ⁠about $1.4 billion in three U.S. factories ​and one Canadian plant that produce gas engines, ...

E15 fuel is becoming more common, but that doesn't mean it's right for your car. Here's what you need to know about E15 and how it affects your engine.

At TopSpeed, William Clavey is Editor-at-Large, where he focuses on authority and exclusive content, reviews, news articles, features, and opinion pieces all while sharing his passion for everything ...

A fundamental difference between gasoline and diesel engines is that a gasoline engine uses spark ignition while a diesel engine uses compression ignition. Before we delve deeper, let's understand how ...

Trying to mix gasoline and diesel in most engines will only lead to problems in the long run. But engineers have found a way ...

Researchers at the University of Wisconsin-Madison have developed a Reactivity Controlled Compression Ignition (RCCI) engine capable of running on both diesel and gasoline simultaneously. By ...

If you've even casually contemplated purchasing a Ram truck powered by a diesel engine in the last couple of decades, the name Cummins is undoubtedly familiar to you. The Indiana-based company has, ...

As two of America's traditional 'big three' automakers, Ford and GM have a rivalry steeped in history. They've each offered similar types of products that fulfill the same purpose for buyers, be they ...

Increasing an engine’s compression ratio is a proven way of unlocking extra horsepower, but there’s a point of diminishing returns. The team at Garage 54, the Russian mechanics who built a V16 using ...

Premium fuel sounds better, but is it really? Consumer Reports ran the tests, and its results could lead to big savings for ...

Toyota recommends 87 octane for the 2025 Prius, but one owner hit 61.1 MPG using 91 premium. We analyze Jason Black’s ...