CLICK & CLACK : Diesel Do Ya

Q Dear Tom and Ray:

I commute 130 miles round trip and am thinking about buying a new diesel Volkswagen. I'm worried about maintenance costs. I read that diesels make up less than 1 percent of the U.S. market, so will it be hard to find diesel mechanics and diesel fuel at a reasonable price? Will it be more trouble than a gasoline engine? -- Terry

A TOM: Diesel passenger cars aren't really mainstream yet, but I don't think those concerns should hold you back. I think people, including us, are warming up to the idea of diesels.

RAY: For years we were vehemently opposed because they were noisy, smelly, smoky, shaky and slow. But a lot's changed.

TOM: Federal law now requires diesel fuel sold in the United States to be very low in sulfur. That, in turn, is allowing carmakers to make cleaner diesel engines that meet the same emissions standards as gasoline engines. That's a HUGE change for the better.

RAY: As new diesels hit the roads over the next few years, diesels will no longer be identifiable by that disgusting cloud of gray soot that envelops them at every stoplight. Better manufacturing and insulation have made them quieter and smoother. And improved fuel-delivery technology has made them quicker. So a new, clean diesel is a worthwhile consideration nowadays.

TOM: In terms of the costs, diesel fuel is currently more expensive than gasoline, but not by a lot. But since diesel fuel has more BTUs (more energy) per gallon than gasoline, you can expect 25 percent to 30 percent better mileage. Of course, you'll have to look around to make sure gas stations convenient to you sell diesel. But on a per-mile basis, it should cost you less.

RAY: Maintenance is probably a wash. While diesels don't need tuneups, because they don't have things like spark plugs or spark-plug wires, they do require more frequent oil changes. Or, more expensive synthetic oil.

TOM: In terms of more serious repairs, you might come out ahead with a diesel. Well-manufactured diesel engines are known for durability. And while everybody seems to be jumping into the diesel game all of a sudden, lots of carmakers, including VW, have been making and selling diesels in Europe for years.

Dear Tom and Ray:

How do you clean the air-conditioning ducts in your car? -- Deanne