The B10 durability rating of the 4HK1-TC diesel engine that powers Isuzu Commercial Truck of America, Inc. cabovers has been increased to 375,000 miles, the company has announced at the NTEA's Work Truck Show in Indianapolis.

The rating means that 90% of Isuzu 4HK1-TC engines are expected to last 375,000 miles before they require a major repair or rebuild. Previously, the 4HK1-TC engine carried a B10 rating of 310,000 miles.

A B10-life rating is an industry-standard gauge provided by engine makers to help consumers determine the long-term durability of an engine. The number following the “B” indicates the percentage of an engine’s population that will require an overhaul before the indicated mileage.

"We are proud to say that Isuzu diesel engines are already known worldwide for their long-term dependability," said Shaun Skinner, the company's president. "Our new B-10 rating is strong evidence that our engines are even more durable than ever."

The turbocharged, intercooled 4HK1-TC four-cylinder diesel engine displaces 5.2L and generates 215 horsepower. Torque ratings vary depending on model.

The engine is fitted to Isuzu NPR-HD, NPR-XD, NQR, and NRR models, as well as the new 2018 Isuzu FTR Class 6 truck. Each of these models is backed by a three-year/unlimited mileage powertrain limited warranty.