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Twin Turbo EcoBoost Engine's Durability

Columnist Jonathan Welsh answers readers' questions about automobiles

Q: I am considering the purchase of a 2013 Ford Escape with the 1.6-liter twin turbo EcoBoost engine. In the past, turbos had durability issues, and as I am planning to keep this vehicle for eight to 10 years, I worry about the problems that this new engine may have. Are my concerns justified?

A: Turbochargers' main enemy is heat and its effect on lubricants. Many early turbos used in cars in the 1960s through the early 1980s failed prematurely because they lacked adequate cooling, and intense heat often cooked the oil that was supposed to keep the turbines spinning freely. However, turbo technology has advanced to the point where they are reliable, though they still require extra attention when it comes to keeping track of oil changes and maintenance appointments.

Q: I have a 2004 Mitsubishi Endeavor with over 75,000 miles. When I make several trips in a short amount of time, the car will often not want to start unless I turn the key one notch and put it in neutral. Then it starts right up. I'm worried that one day it just won't start and I could have prevented being stranded!

Any idea what I can tell the dealer to look for?

A: My guess is that you have a fueling problem. My carbureted 1967 Ford acted this way when its mechanical fuel pump was losing pressure. Today's computer-controlled, fuel-injected engines can show similar symptoms when there is a leak in the injection system.

I would ask the mechanic to give special attention to the fuel system on your next visit.

Q: I have always wondered if the EPA numbers shown on cars include the effect of ethanol. Articles have said that ethanol reduces gas mileage about 8% to 10%. I had a 2010 vehicle (Nissan Rouge) which never came close to the EPA numbers, so I traded it for a 2012 Jeep Patriot. After a limited number of miles, it had the same problem—about 8% to 10% below EPA number.

A: EPA fuel-economy ratings are based on non-ethanol gasoline, which leads to confusion since ethanol is mixed into fuel in so many regions that consumers tend to forget about it. In most cases that is the reason why so many drivers find their fuel economy disappointing.

Q: My last two trucks, a 2003 Dodge Dakota and a 1994 Ford Ranger, are no longer being built. I've had a couple of "car payment" sized repair bills recently with the Dakota (replaced driver side power window motor; rebuilt manual transmission, replaced radiator). I'm just wondering what you would suggest for replacing a small pickup truck out of current options on the market.

A: The best option is probably the Toyota Tacoma. It is comfortable and reliable and is among those vehicles that seemingly "run forever." They have been top sellers for many years, so there are also many on the used market should you choose that route.

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