Revisit MotorTrend's 2004 comparison test as the Porsche Cayenne S battles the BMW X5 4.4i, Infiniti FX45, and Cadillac SRX V8 AWD on the street and at the track to crown the ultimate performance SUV.

Yamaha Goes All-In on the 2027 YZ250F — And the Rest of the Off-Road Range Follows Suit Yamaha dropped a significant ...

The Dodge Magnum SRT8 and Mercedes-Benz E55 AMG wagon delivered acceleration numbers so surprising that MotorTrend ran ...

Four-stroke engines, which make up 99% of vehicles on the road, rely on a system for managing air intake, compression, combustion, and exhaust within a sealed combustion chamber. Poppet valves are ...

Although some maintenance schedules include an interval for replacing the positive crankcase ventilation, or PCV, valve, others may not. In the latter case, a general recommendation is to replace the ...

CHEVRON WITH TECHRON! BP gasoline with Invigorate! And here's a new one: Nitrogen Enriched Gasolines from Shell! Fuel additives have some pretty hokey names, but behind them is real chemistry. It's ...

This article was researched using 4 sources. See our methodology and corrections policy. A valve job is a major engine maintenance service that involves removing, disassembling, inspecting, refacing ...

The 2023 Corvette Z06 is officially here with a new flat-plane-crank 5.5-liter V-8 engine. It makes 670 horsepower and 460 pound-feet of torque and routes through an eight-speed dual-clutch automatic ...

Let's spare the drama and get to the results right away. Starting with a bone-stock 351W truck engine, we bored the block 0.020-inch over, fitted KB flat-top pistons to the stock crank and rods, ...

Give them the results of a TDC valve-drop static clearance test, and Comp Cam's techs can calculate the piston-to-valve clearance for any of its cams at any degree of rotation. This is especially ...