Some engines have become legendary because they continue running reliably after hundreds of thousands of miles. Whether powering family sedans, pickup trucks, or commercial vehicles, these powerplants earned the trust of mechanics and owners alike. These eight engines are widely recognized for handling extreme mileage better than almost anything else.
Toyota 2UZ-FE
The Toyota 2UZ-FE is a 4.7-liter V8 built with a rugged cast-iron block that delivers exceptional durability. Used in the Land Cruiser, Tundra, Sequoia, and Lexus GX, it regularly exceeds 300,000 miles with routine maintenance. Its strength and reliability have made it one of Toyota’s most respected truck engines.
Honda K24
The Honda K24 earned a reputation for combining strong performance with outstanding longevity. Found in the Accord, CR-V, Element, and Acura TSX, it features durable construction and efficient engineering. Properly maintained examples commonly surpass high mileage while remaining smooth, dependable, and inexpensive to maintain.
Chevrolet Small-Block 350
The Chevrolet Small-Block 350 became one of the most successful V8 engines in automotive history because of its simple design and proven reliability. Used in countless cars, trucks, and SUVs, it is known for lasting hundreds of thousands of miles. Its massive parts availability also makes long-term ownership straightforward.
Toyota 1HZ
The Toyota 1HZ is a 4.2-liter naturally aspirated diesel engine renowned for its exceptional reliability and longevity. Used in the Land Cruiser, it was designed to withstand harsh environments, heavy loads, and continuous operation. With routine maintenance, many 1HZ engines exceed 500,000 miles, making them one of the most trusted diesel engines ever produced.
Toyota 22R
The Toyota 22R became famous for its dependable overhead-cam design and ability to withstand years of daily use. Installed in Hilux pickups and other Toyota models, it handled work, off-road driving, and commuting with ease. Its mechanical simplicity helped establish one of the strongest reliability reputations in the industry.
Jeep 4.0L Inline-Six
The Jeep 4.0-liter inline-six earned widespread respect for its rugged construction and excellent durability. Used in the Cherokee and Wrangler, it handled daily driving, towing, and off-road adventures with minimal issues. Mechanics continue recommending it as one of the longest-lasting gasoline engines ever produced.
Mercedes-Benz OM617
The Mercedes-Benz OM617 five-cylinder diesel became legendary for routinely covering several hundred thousand miles with basic maintenance. Featuring a cast-iron block and mechanical fuel injection, it proved exceptionally reliable in both passenger cars and commercial applications. Its reputation for longevity remains unmatched among classic diesel engines.
Cummins 5.9L 12-Valve
The Cummins 5.9-liter 12-valve diesel is celebrated for its cast-iron construction, mechanical fuel injection, and remarkable long-term durability. Used in Dodge heavy-duty pickups, it thrives under heavy towing and demanding workloads. Properly maintained engines frequently surpass half a million miles, making them favorites among mechanics and truck owners alike.
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*Research for this article included AI assistance, with all final content reviewed by human editors
