GM Authority

GM Gen. 5 Small Block Deep Dive Part I: The LT1 Advanced Combustion System, Direct Injection, And AFM

For Part II, covering the valvetrain, exhaust, and cylinder heads: click here. For Part III, covering the block, crankshaft and lubrication systems: click here. To properly fathom the lengthy, ...
Jalopnik

Direct Injection Engines: Why Carbon Buildup Happens (And How To Prevent It)

Automakers have long touted the benefits of fuel injection, claiming increased efficiency and power. But as more cars have the system installed (around 73% in 2023), more and more consumers are ...
Consumer Reports

Direct-injection engines improve performance and save fuel, but at a price

It has been touted as the automotive holy grail, the ultimate marriage of better performance and greater fuel economy. It's the direct-injection (DI) engine, the latest technology designed to squeeze ...
JSTOR Daily

Engine Oil Effects on the Friction and Emissions of a Light-Duty, 2.2L Direct - Injection - Diesel Engine: Part 1- Engine Test Results

The effects of lubricating oil on friction and engine-out emissions in a light-duty 2.2L compression ignition direct injection (CIDI) engine were investigated. A matrix of test oils varying in ...