It delivers surprising power for its size, producing roughly 310 horsepower and 348–430 lb-ft of torque . Owners often report it "zips" through traffic and feels responsive once the turbo kicks in.
Often used in the Chevrolet Silverado and GMC Sierra, this engine is frequently debated for being a 4-cylinder in a full-size truck. lb3.zip
While efficient, there have been high-profile teardowns of early models (e.g., 2019 versions) that failed prematurely at around 146,000 miles due to internal issues. It delivers surprising power for its size, producing
Watch a detailed teardown of a high-mileage LB3 engine to see common failure points and internal wear: lb3.zip
It is designed to run on 87 octane fuel . Some users report getting up to 4 MPG better than the larger 5.3L V8.