THE CAR DOCTOR

Buying advice and expert solutions for your car troubles from AAA "car doctor" John Paul.

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Can't find that part you're looking for? Looking for tips on the latest models? E-mail John your car questions.

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About John

About John

John Paul is public affairs manager for AAA Southern New England and a columnist for Boston.com. A certified mechanic, Paul tests dozens of new cars each year and also hosts a radio show.

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Tesla coming to Boston auto show, 8 other brands call quits
(Clifford Atiyeh/Boston.com)The Tesla Roadster near Pigeon Point Lighthouse in Pescadero, Calif. during a road test. Tesla Motors, which opened a Manhattan showroom in July, will...

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GUIDES

PHOTO GALLERIES

Burnt-out bulb? You'll need an app for that

Q. What is happening to cars that I need a computer to replace a headlight bulb? Is this a plan by auto manufacturers to block car owners from doing their own repairs? (By John Paul, Boston.com, 10:48 a.m.)
RECENT COLUMNS

An S4 over an M3?

Q. If you had a choice of a BMW M3 or an Audi S4, which car would your buy and why? (By John Paul, 11/5/09)

Low rolling resistance tires do save fuel

Q. Can tires actually save gas? I have been hearing about tires that can cause the car to use less fuel, is this true? (By John Paul, 10/26/09)

Use low-pressure spray to find water leaks

Q. The roof on my 2008 Cadillac CTS has two glass panels. One leaks on the head of the right rear passenger and the water stain continues from the roof down by the passenger's shoulder and puddles in the right rear floor well. I have taken it to the dealer twice with no positive results. Help! (By John Paul, 10/7/09)

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About Pete

About Pete

Peter DeMarco writes about the rules of the road we all should know but really don't. His column, "Who taught YOU to drive?" appears every other week on Boston.com and in the Boston Globe's regional editions.