Gary Witzenburg


Gary is a long-time contributor who writes about vehicles, engines and technology.

Mighty Mini 3-cyl. Features BMW’s Latest Tech
Technology includes turbocharging, direct injection, dual Vanos variable camshaft control on intake and outlet sides and Valvetronic fully variable valve control.
Ram Ecodiesel Barely Louder Than German Luxury Cars
One key contributor to its unusual quietness is its rigid compacted graphite iron (CGI) block and bedplate. CGI typically reduces combustion noise 0.5 to 1.5 dBA vs. conventional gray iron.
BMW’s Clean Sheet EV 2
The i3 is purpose-designed to provide something approaching BMW performance and handling, along with ultra-high efficiency.
GM’s Fuel-Sipping Beast 1
The classic image of a V-8 is big and thirsty. Engineers set out to dispel that notion by making the small-block Gen V engines extremely efficient. Along the way, some dynamometers also got toasted.
Audi’s Supercharged V-6 Makes V-8s (Almost) Obsolete
Surprisingly, it was planned as a small-volume engine for high-performance compact S4s and S5s. Now it is Audi's only V-6 available in midrange A6s and A7s, the flagship A8 sedan and Q5, SQ5 and Q7 CUVs.
Toyota Rolls Out First Turbocharged Engine Since 1998 1
Toyota considers turbochargers similar to hybrid systems because they both amplify engine performance.
VW’s Featherweight Fuel Miser
VW’s third-generation EA888 I-4 is a modularized masterpiece that plays many roles well.
With 3.5L V-6, Honda Proves Less is More
Honda engineers achieved impressive fuel efficiency and output without dual-overhead camshafts or direct fuel injection, which add substantial cost, complexity, mass and package size.
Cruze Diesel Impressive Effort Against Germany’s Best
Clearly it will take time to find a following like VW has developed over decades in the U.S. But as far as the engine itself is concerned, the GM 2.0L turbodiesel is a strong start.
Fiat 500e Truly Fun-to-Drive EV 10
A rookie EV team created a smashingly good conversion of Fiat Chrysler’s B-Car.
After 50 Years, Porsche’s Iconic Boxer Still Improving 1
Porsche 2.7L boxer 6-cyl., which is standard and not an up-power option in ’14 Boxsters and Caymans, is one of the sweetest yet.
Ford’s 3-cyl. EcoBoost Delivers the Goods 1
Good NVH without a balance shaft is just one of the engine’s many pint-sized innovations.
BMW 3.0L Diesel Smooth, Powerful, ‘Remarkable’
BMW diesel engine chief Peter Nefischer says the N57's top design priorities were efficiency, compact packaging, low emissions and the best possible power-to-weight ratio.
New GM V-8 Proves Pushrods Still Rock
The 6.2L LT1 is physically smaller and lighter than a twin-turbo 4.4L V-8, but it makes more power and torque with better fuel efficiency.
BMW’s Iconic I-6 Evolves But Does Not Change
The toughest non-technical challenge was convincing people inside the company the single-turbo/Valvetronic concept was better than the N54's twin turbochargers.


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