in 4 months, I have managed to put the following list into my truck, all prices are taken from receipts, except the trade lines, thats were I traded my winter beater Chrysler Concorde to a parts yard for the listed pieces.

Complete engine flush 12 qts oil, filter, 3 gallons Antifreeze $58
Replace glowplugs 8 x 9.99 = $80
replace glowplug controller $109.99
replace spring mount $40
replace rear brake lines $12
replace rear brake shoes $35
replace rear wheel cylinders (2) $35
replace rear shocks $40
replace rear tank TRADE
replace main fuel lines $20
install electric fuel pump $25
replace front clip & doors $400
replace interior TRADE
replace box TRADE
install trailer light harness to rear bumper and tool box $75 parts
install gooseneck hitch $80 in steel $21 for ball
make front bumper $105 in steel
install plow and controls ??? (borrowed from neighbor)
replace tierod end $28
replace drag link $79
replace u-joints $450 for all with **
install new exhaust $125
replace both batteries $100
replace injection pump $150 labor $200 pump
replace alternator $75.00
front end alignment $60
replace rims TRADE (did not need to, but they look nice)
replace 1 tire & balance tires $130
replace toolbox struts $45
replace plow markers $15
install plow lights $106
replace dimmer switch $15
install glowplug override switch $15 in parts
prep and paint materials $60
Voltage regulator $41.87
replace Radiator $349.00 **
replace tstat $7.81 **
4 gallons A/F $40.00 **
labor for items ** $110.00
replace heater core $38.00
heater core labor $40.00
replace throttle cable $54.00 (my own fault, please note, Throttle cable is not to be leaned on)
throttle cable labor $15.00
replace injector return caps $37.00
labor for caps kit $25.00
Fan Clutch $153.00
Radiator cap $8.00

Replace belts with proper type: $67.13
replace front shocks $74.35
Replace filter hsg return line check valve $24.37
Pint of A/F conditioner $5.50

 

I have an old 87/88 6.9 with a 5 speed. It gets 20 mpg city/highway with a 200lb canopy on the 8 ft been.

I also have 96 PSD with the 4 speed auto. It gets between 17 to 19. With a 7500 lb trailer/boat load I got 13.9 mpg.

Some is wrong with you engine if your in the 4 mpg range.