I have ridden in a dsl truck, They make lots of noise,sometimes smoke, can't pull a heavy load up a hill at 60 mph and watch a gas job pass them.

It may seem like I'm anti dsl, that would be somewhat true. There have been incredible amounts of money spent on the technology in the last 10 years. They have improved them quite alot, the ignition principle is top-notch, not having a burnable mixture in the cylinder until it's time to lite it is a very good thing. Also the heavy expensive components are good for dependability (not cost or weight) The fuel itself is considerably safer as well and maybe cheaper to store, transport, and carry on board. Turbos and intercoolers are the savior of the dsl engine.

If a gas engine had half as much money and technology spent on it it would be leaps and bounds ahead of dsl instead of just a bit ahead of dsl in power.I have spent considerable amount of time and money testing building and dynoing converted dsl engines to know that by changing the fuel to any gas fuel will nearly double the tork and hp of any dsl engine even when dropping compression ratio and backing turbo boost down to a safe level. Also the fuel mileage will be just about cut in half too.