With hybrids becoming an ever more common sight on US roads, CarBuzz decided to find the most efficient model currently on sale in 2025.

OK, we admit, we're a long way from a carbon-free grid—but when we have one, what's the most efficient way to use that energy ...

Following a decade of innovation and engineering, the company's new 13-liter DC13 engine is its most sustainable engine ...

OK, we admit, we're a long way from a carbon-free grid—but when we have one, what's the most efficient way to use that energy to fly planes? This question is explored by an interactive tool built by a ...

Over the past century, the V4 engine found its way into cars that were meant to be light, practical, compact, and fun to ...

Horse's brief wasn't simply to churn out new electric motors and battery packs for pure-electric vehicles but to create a comprehensive lineup of efficient combustion engines, transmissions and ...

How often should I replace my hot tub cover for maximum energy efficiency? Most hot tub manufacturers and dealers say hot tub covers have a life span of about five years. If your hot tub cover ...

It is also improving its EV Drive Mode and Hybrid Drive Mode to maximize combustion efficiency, power conversion, and engine efficiency ... What we’re most excited about is their eventual ...

EPA’s latest greenhouse gas emissions rule offers more incentives for EVs than just an easy emissions test and expects 'most if not all' manufacturers to use EVs in their compliance ...

Another one of the most fuel-efficient diesel cars available is the Renault Clio ... This is because traditional combustion engines need time to heat up and get fuel pumping round the engine. Taking ...

Then, there’s the larger 1.2-litre, four-cylinder engine, which is marginally less efficient with an average of 23.9kpl. The Dzire is the most fuel-efficient compact sedan you can buy in the market.