The Mazda MX-5 is one of the world's best handling cars under $25,000, and as much as we Americans want more power and size to turn the Japanese roadster into a proper pony car, that's probably not going to happen. Increased fuel economy and CO2 reductions will force the MX-5 into the same situation as larger vehicles. It has to get more efficient and lighter to stay competitive. MX-5 program manager Takao Kijima told Drive that Mazda is looking at alternative powertrains for its little roadster, but the Zoom Zoom specialists are also looking to drop 10% of the car's weight.

I'M LOSING MY BET ON DIESELS

A few years back I made a bet with a former Director of Engineering at General Motors. I bet him five bucks that Americans would fall in love with modern diesel engines and would want them in their cars. Specifically, I predicted that diesel sales in passenger cars would reach 1 million units by 2012. He bet it wouldn't happen.

Last year I ran into him and he ruefully conceded he was probably going to lose the bet. But that was last year. Now I'm pretty sure I'm the one who's going to lose. What a difference a year makes!

Hybrid schmybrid. Volkswagen's rolled out a concept of its next-gen Golf outfitted with an ultra-efficient BlueMotion diesel that gets better fuel economy and emits less carbon dioxide than a Toyota Prius.

Truck shoppers hoping to grab a Mahindra pickup early next year are gonna have to wait a little longer. It seems the challenges of bringing an India-made vehicle to the U.S. are difficult, and the vehicles now won't go on sale in the U.S. before the fourth quarter of 2009.

The car you see here is not a GNX. Hell, it's not even a Buick. You'd be forgiven if you thought it was, though, and it does sport a turbocharger underhood. David Morad was so enamored with the 6.6L LB7 Duramax diesel in his truck that he wanted to put it into something lighter and more fun. He decided to build a Grand National around the engine, and started buying up whatever applicable Buick body parts he could find -- right down to legit GNX dash plates. Next, he bought an '82 Buick Regal diesel that was to be the subject of the transformation. Unfortunately, that car literally self-immolated as he drove it home, sending Morad straight back to square one.

Click above for high-res gallery of the 2009 Bentley Brooklands