By on July 6, 2015

Mitsubishi GDi Engine (Dion)

Hi Sajeev & Steve,

“You have not covered extensively the problems encountered by GDI engines, especially Mitsubishi Dion (the engine is 4G63). As the revs go beyond the 2000 rpm, the ‘check engine’ light comes on, then eventually the engine — if forced — cuts off. After a few minutes, the engine can start but it does not take long before it repeats. I was told by a mechanic to buy a new pressure pump. This was fitted but the problem has not gone away. Please help!”

Ummm… we think your mechanic needs to keep away from Runaround Sue.

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By on June 23, 2015

Supercharged 6.2-liter HEMI® Hellcat V-8 engine produces 707 ho

Changes are coming to FCA’s HEMI engine family, ranging from increased fuel economy, to higher horsepower.

(Read More…)

By on June 9, 2015


Looks legit. (photo courtesy: n0str9 @

Arley writes:


I have a 2003 Jetta TDI with 178k miles. Runs 100%. My mechanic recommends a carbon cleaning. What are the positives and negatives? To be more succinct, what can go wrong?

You can tune a piano but you can’t tuna fish. (Good to know! – SM)

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By on April 7, 2015


A new option available to the Toyota Auris today, the automaker debuted the second turbocharged piece of its new engine family.

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By on December 18, 2014


Aside from rebuilding itself in North America, Alfa Romeo is set to introduce a new family of high-performance engines into the lineup, the first of which will come in the next six months.

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By on December 9, 2014


Fiat Chrysler Automobiles’ Chrysler Group has big plans for its venerable Pentastar engine family, all in the name of improved fuel efficiency and power.

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By on February 5, 2014

Nitin writes:


I read your blog about the problem in BMW. I have a 2009 BMW 535i X drive with turbo. The car just ran out of warranty and has 45000 miles only. My car started having engine problems last week. First, the BMW said it needs new spark plugs as they were dirty. That cost me $740 dollars. That did not work. They said it needs new fuel injectors. That was another $2100 dollars. (Read More…)

By on January 29, 2014

Volvo Drive-E Engine, 2.0L twincharged, Picturre courtesy of Volvo

Engine downsizing is all the rage. Making the engine smaller increases fuel efficiency, reduces emissions and cuts vehicle weight. With ever tightening fuel economy legislation in the United States and CO2 emissions regulation in the European Union, mainline manufacturers are turning to turbochargers like never before. In 2009 just 5% of cars sold in America sported turbos, and that 5% consisted largely of European brands like Volvo and BMW with a long history of forced induction. By 2013 that number had more than doubled to 13%. Honeywell expects the number to rise to 25% in the next four years and the EPA tells me that by 2025 they expect 90% of cars sold in America to sport a turbo engine. With turbos becoming so ordinary, what’s a turbo pioneer like Volvo do to keep a competitive edge? Add a supercharger of course.

(Read More…)

By on July 29, 2013


Evan writes:


I have a piston slap question for a friend at work. She drives an ’11 Mazda CX-7 2.3. For over a year she has had an issue with fuel in the oil. Enough that the oil level has been as much as 1″ above the full mark on the dipstick as a result (oil level was checked after service, and frequently between services). This is noticed within weeks of service/oil change. (Read More…)

By on July 25, 2012



Kurt asks:

I’ve heard from maintenance shops and oil additive producers that DI engines, especially Audi and BMW, have severe problems with carbon buildup in their valve systems. Might be good to chat about this and also poll readers to see if other vehicles have the same issue. Thank you. (Read More…)

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