Modern Hemi engines, the iconic powerplants from Chrysler, have sparked a debate among owners about their fuel needs.

You have a choice when you pull up to the pump. Most gas stations have three choices for fuel for your vehicle, based mostly on octane ratings. Which one is the best for your vehicle? A lot of that ...

With every passing day the Mule provides opportunities beyond our original expectations. Since the 467ci engine belongs to HPP editor Tom DeMauro, it is at our beck and call. This affords HPP the ...

2025 is turning out to be a busy year for Cummins and its well regarded diesel engines. Following the launch of the updated Cummins 6.7L turbo diesel engine for the Ram 2500 and 3500 series, Cummins ...

For automobile owners looking for ways to get maximum performance out of their vehicle, there is no particular shortage of options that can ensure your engine is, as the saying goes, "firing on all ...

STARKVILLE, Miss.—For two decades, the dynamometer at Mississippi State’s Center for Advanced Vehicular Systems has powered engine research and testing for consumer, industry and military applications ...

We've all seen octane ratings at the fuel pump, and based on the numbers, it's easy to think the higher number is better. From lowest to highest, the types of gasoline are regular, mid-grade, and ...

The higher the fuel’s octane rating, the less likely it is to prematurely ignite and cause engine knocking. phive2015/Adobe Stock We see the numbers every day at the local gas station, with gas sold ...

Gas versus diesel is a debate over which billions have been spent to see which is better. Famously, Soviet tanks in World War II were powered by diesel, while the Germans used gas engines. Closer to ...

Premium gas can give some cars a boost, hyping performance and making sure the engine runs smoothly. But not every car can make good use of premium.

We put together a budget 5.7L LS engine (327 cubic inches) to show that you don't have to go broke to enjoy the benefits of an EFI-equipped LS engine in your classic Chevy. The engine ended up making ...