Urea injection? Won’t that give them gout?

“Adding 20 percent to mileage using a diesel engine that costs more to buy and uses a fuel that is almost 20 percent more expensive than gas—seems to me to be a waste of time.”

Yeah, I couldn’t agree more. It’s completely a marketing move “Better fuel economy is better! Obviously!” Sadly, if you’re changing the fuel, that’s not the case. Let’s look at the expected benefits of better fuel economy:
1. Cheaper – less gas costs less
2. Emissions – less emissions because less gas is being burned
3. Longer driving range between fillups

Sadly, with diesel, only #3 comes true (at least as far as I understand how these things work):
1. The engine costs more AND each gallon of fuel costs more (the last time I check, here in Minnesota, USA diesel was $1/gallon more than gas).
2. Even modern “clean” diesel engines pollute more than the cleanest of their gasoline counterparts – that’s why it’s “50 state emissions”, not “52 state emissions”.
3. If they keep the tank size the same, then I guess this would hold true.

So (like the previous poster said) – why would I spend more money for a diesel engine which:
1. Costs the same or more per mile to run, and
2. Emits just as much or more pollution than a gasoline engine?

You guys aren’t very well informed.
- First, diesel fuel doesn’t follow the same price pattern as gasoline. Sure it costs more at the present, but ya gotta look at the big picture.
- Second, the only emission area that diesels do worse on is NoX. All other emissions are substantially less than a comparible gasoline engine (and that’s not counting the fact that the diesel engine will go farther on a gallon than the gasoline engine)
- Also, one of the best reasons for a diesel engine is that they are both more efficient and more powerful (torque) than a similar sized gasoline engine. Putting a diesel in a truck is a great idea, as you can:
1. Use a smaller engine to maintain the tow and haul ratings and get much better fuel economy, OR
2. Use a larger engine to maintain fuel economy but dramatically increase towing and hauling capabilities.
3. Towing with a diesel engine doesn’t ruin fuel economy the same way it does with a gasoline engine, as the engine is much better suited to pulling things as most of its torque (pulling power) is available at a very low engine rpm, whereas a gasoline engine has to rev much higher to achieve it’s maximum torque.

Electric drive is the best for torque, with steam power being the second best. There is no argument to that statement that is valid, because there is no argument to that statement that is true. A good potential investment by the auto companies is to develop hybrid diesel technology in large trucks. Electric drive gives a vehicle maximum torque off the line, and if it is still a hybrid, then you get the benefits from hybrid-electric drive that we’re all so aware of. The 20th century model for the auto industry has finally been invalidated through the end of the age of cheap oil. We still have enough large vehicles in our fleet to purchase used trucks instead of new ones, and considering the current economics of driving, there is no incentive, other than what the car dealers offer of course, to buy a large vehicle. There is no benefit to diesel not present in hybrids. And even with lower up-front costs to diesel purchasers compared to hybrids, that savings is not retained at end-of-life. Economically speaking, a person would naturally prefer a hybrid to a diesel. Environmentally speaking, a person would prefer a hybrid to a diesel. And technologically speaking, a person would prefer a hybrid to a diesel. But to make the point clear, I mean a gas-electric hybrid. If the auto companies can make a diesel hybrid, then that will be a clear winner. We are in a new age for cars: We want our vehicles as efficient and technologically advanced as possible, not just more powerful, bigger, and with more gadgets. We got all of that in the 90′s.

I think smelling any exhaust fumes without fresh air for an extended period will shorten your life span.

I agree a diesel-electric truck would probably kick ass. But diesel in any form is better for pickups than gasoline. Hybrid or otherwise.

With any turbocharged vehicle (diesels especially), you are doing yourself a huge favor to have your air/fuel ratios tested, and then have someone reflash your ECU so that it runs leaner. Most every 7.3L Powerstroke is capable of 25 average MPG. People just need to have the knowledge to utilize their engine properly.

Engine manufacturers usually run all engines rich from the factory, to ere on the side of safety against knock and ping. Every engine is different on microscopic scales, and since they don’t test them all, they load REALLY conservative AFR maps and let you deal with whatever you get.

Anyway, perfect AFRs in a diesel consistently get 40-60% better mileage than equivalent gasoline engines.

So what the manufacturers are trying to figure out is how do you create an ECU with some fuzzy logic to get perfect AFRs in a diesel. The potential for diesel is exceedingly good. It has just been misutilized until we had a fuel crisis.

Each successive generation of diesel engines will be just as promising as successive generation of hybrids. When both gas and diesel hit $5.00/gal, we should all be glad to have options.

Electric cars are more coal burners than oil burners. The oil crisis in the late 70′s changed that, in case you were unaware. They’re also natural gas burners, wind users, solar vehicles, and geothermal users. The grid’s power is generated from diverse sources, but you’ve got it right that they are still cars with long extension cords and long tailpipes. So nice point, I guess.

“Yeah, how much carbon has to be burned to run a plug-in hybrid far exceeds that of a bio-diesel or diesel-hybrid. Coal is way less energetic than gasoline or diesel, so you have to burn more to make the same amount of energy. And thats before you even calculate the loss of transmitting it hundreds of kilometers via high-tension wires.”

Is there an actual source for this? Because I’ve been told (though find just as unbelievable as your statement) that a coal power plant is much more efficient than burning gasoline. I’ve also read that if you get all your electric power from coal, an electric car would be about the same as a gas one.

I find this FORD a very nice vehicle, it has nice look, isn’t that big, but isn’t that small either, just the correct size, and it looks a lot better on the inside and outside now. More news at The Auto Buzz