Simply put... I don't give a crap. I've spent the last 6 years with diesels and I simply don't buy that arguement any more. Sure, properly maintained, a diesel will last near-on forever... Guess what? So will a gas engine.
I don't want to be argumentative, but here is my take on things:
The longevity of mainstream diesels has been documented now for 30 years. Cummins recommends a rebuild at 600k for most of their 6BT and ISB engines in commercial applications. Cummins puts a 5.9 in a 26,000 GVW truck with a 20,000-lb tow rating, and they recommend you rebuild it every 600k. Put a 305 in a Monte Carlo and pray it makes it to 200k with love and synthetic oil.
Yeah... much of the repair costs can be saved by DIY'ing, but in the case of the Cummins, the fact is I simply HATE working on that POS engine. I HATE the smell of diesel. And that effing truck leaks like a bloody sieve (injector rails). Hell, half the reason I still own a diesel is because I work in NJ and never have to pump the smelly E36 M3 myself.
Its pretty obvious that your hatred of diesel is emotional and personal, not quantitative. If your truck leaks diesel, you should fix it. Letting it leak and cursing the smell is like hating the smell of your farts but not being willing to change your diet. The Cummins 6BT and ISB are paragons of reliability, longevity, and value. There is a reason that they command over 1/2 of the light commercial market even though there are 14 major manufacturers of LC diesels.
If I ever buy another diesel truck, it will be new. With a warranty. and probably leased so by the time the warranty is up, I give it back and get another one.
Then you are not a wise grassroots investor. Diesel trucks these days have at least a 100k warranty. Why pay the insane cost of a new diesel truck only to have it lose the majority of its value in the first year? Why not buy a 20k-mile truck that is a year old and let the dummy who bought it first take the depreciation hit?
The thing is, most people who buy diesels don't drive enough miles for the mpg gains to ever pay back the initial purchase costs. That was the case with my truck (even ignoring the engine repairs). I've driven the truck less than 6K miles in 2.5 years... I can count the times I've filled the tank on two hands. For ME a diesel truck was a poor decision, and when posting in threads like this I'm trying to simply convey the realities of owning a diesel from the perspective of someone who will admit they made a mistake. Should have just kept and fixed my damn van...
A very good point about "underdriving" a diesel... but I disagree with what you say. Most people who buy diesels drive WAY more miles than those who buy gasoline trucks. I have a diesel F350 in my shop right now that is a 2008 model with 122k on the ticker. If you only put 6k on a vehicle in 2.5 years, then you should have bought a 67 Camaro. Comparing your experience with diesel with your small mileage to someone who actually uses it every day is just not really a viable commentary. Chances are you have developed bacterial growth in your fuel system that has caused many of you problems. But that is no different from a gas vehicle. Let a gas car sit without fueling for 6 months and the gasoline is useless, too.
My wife has put 200k on her 99 Mercedes diesel as a daily driver/commuter. Depending on the job, she has commuted anywhere from 1/2 mile to 16 miles to work. So far I've done scheduled maintenance and had to replace the radiator and fan when she hit a curb that pushed the radiator back into the fan. She also has some corrosion on a taillight bucket that makes the "brake light bulb" indicator illuminate.
The math has been done... here is how it plays out as of 2007 average numbers (based on the several hundred light-duty gas and diesel trucks under my charge from 2001-2007) based on the following factors:
- purchase price
- sale price
- maintenance cost
- repair cost
- fuel cost
- insurance cost
The gas fleet (per vehica :) cost us a full 31% more to consume than the diesel. Those are hard numbers based on hundreds of vehicles from all three manufacturers. Start to finish, mile for mile, the gas vehicles cost us a full 31% more. If you exclude the puchase/sale prices, sure, diesel is much higher... but from start to finish (as long as you're not putting a measly 2400 miles a year on the vehicle) the diesel puts way more money back in your pocket than the gas.
To add to the argument: We had a fleet of dispatch repair vehicles that were either S-10 or Ranger 4-cyl manual trucks. The dispatch trucks saw about 18.5k miles a year. The utility trucks saw about 50k a year with long periods of idling. The dispatch vehicles with their tiny mileage cost more to operate and maintain than our fleet of diesel 3/4 and 1-ton trucks. We spent more on the dispatch/repair fleet than we did on mobile repairs for our entire fleet.