You have 3 different truck choices to choose from, and 3 different diesel engines to choose from. It's all up to you. I prefer Ford's 6.7L Powerstroke Turbo Diesel V8. I'll help you make a decision. Read below.
FORD 6.7L Powerstroke Turbo Diesel V8 - Ford really has confidence in this new engine. They have gave over 20 trucks with this engine out to Halliburton, Florida Power and Light Company, Reynolds Ashpalt Company, K&K Ranch, and Texop Construction. So far the trucks have around 30,000 miles and no problems. The engine really looks good on paper, but only time will tell to see how well this new engine is. I myself really have confidence in it. (note: Ford's diesel is no longer made by Navistar/International. Ford is building their own in-house diesel engine now.)
Chevrolet/GMC 6.6L LML Duramax Turbo Diesel V8 - This also is a new engine. It produces slightly more power than the 6.7L Powerstroke from Ford but who knows which engine really is better. I feel that General Motors is finally catching up to making a good truck like Ford has been doing for over 50 years. This new 6.6L Duramax should be a good engine, but once again, only time will tell how good this engine is.
DODGE 6.7L Cummins Turbo Diesel I-6 - I have no doubt that Dodge and the 6.7L Cummins can't even hold a candle to Ford and GM's diesels. The 6.7L Cummins is known for many problems. I'll name a few: mushrooming heads, turbo failure, clogged DPF (diesel particulate filter), cooling manifold failure, bad fuel economy, etc. Also, Chrysler and Dodge's quality ratings are down and it really shows when you put some wear and tear on to a Dodge pickup truck.
Like I said above, I am prefering Ford's new 6.7L Powerstroke Turbo Diesel.
(note: this was written Thursday, July 29, 2010 at approximetly 9:54 PM.)
The best dually diesel pickup truck would be Chevy or GMC 3500 with Duramax and Allison transmission.
The Allison 1000 which is mated with the Duramax diesel
It depends where one looks but a frequently recommended truck for diesel truck pulls is the Ford diesel truck but does cost nearly $60,000. Also recommended are the GMC diesel truck and the Dodge diesel truck.
Dodge. Straight up.
The best all around truck is the Ford Powerstroke, lots of power, handles good and has good gas milage for a diesel.
Amsoil synthetic oil seems to be your best bet for oil for your diesel truck. It helps to prevent oil from becoming foamy and it works in even very hot environments.
Considering that a diesel pickup truck can't use gas I would say that there aren't any diesel trucks that get good gas mileage. If you were wondering which diesel truck gets the highest miles per gallon then I would say you should look at the Dodge Cummins diesel.
The best way to find out the gas mileage on your diesel truck would be to go to the popularmechanics.com website. I don't know which year, make or model this particular truck is therefore the mileage would depend.
The advantage of a diesel truck is that diesel burns more efficiently than regular gasoline. However, parts and service for a diesel truck are sometimes higher.
The best mileage for a three quater ton diesel pickup truck is 15 mph. It will only change if you going on a stopping trip and you don't use a highway on a long trip.
Diesel trucks are sold from numerous companies, but the best company that you can purchase a diesel truck from would probably have to be Ford, due to their price.
You can only use the fuel oil in the diesel truck.