Where are you getting fuel for those prices. I don't think most buy a diesel for the payback. I get a maximum 18.3 mpg with a Chev 305. Lets figure a 350 gets 17 mpg max. A 12v Cummins could likely get 20 mpg doing the same thing. Here diesel is 1.219 or 4.61/gal and gas is 1.189 or 4.49/gal. I'll figure over 400000 miles. Figuring the diesel lasts all of that and the gas needs a rebuild at 200000 miles. Lets say the diesel needs injectors at 200000 miles at 115 a piece($690) and a turbo at 200000 miles($800) and a head as well($800). The rebuild for the gas will be $1200. Oil changes will cost $30 for gas and $70 for diesel every 5000 miles for a total of 80 oil changes. 1/4 of the trucks life will be spent towing a 10000 lb flatbed for a total of 100000 miles. Gas mileage will be 8 mpg and diesel will be 10mpg. That means the diesel will take 24,090.1 gallons for a total cost of 111,055.36 and the gas will take a total of 30,147.06 gallons for a total cost of 135,360.26. Oil changes will cost the gas $2400.00 and the diesel $5600.00 Total cost for the diesel will be 118,945.36. Total cost for gas is 138,960.29 leaving over $20000 to buy the diesel. Even over 200000 miles the diesel would pay. I realize I'm comparing two trucks that could be up to 15 years old so lets do this with a new ones. Being you're a GM guy I'll put a 2011 Chev Silverado with a 6.6L diesel against a Chev Silverado with a 6.0L gas. Both will be extended cab 4wd sb LT trim. The gas costs 41440.00 and the diesel $52260. Over 300000 miles. No rebuilds on anything. Each need the same number of sensors replaced. We'll say the 6.0 gets 13 mpg and the diesel 15 mpg. The gas at 8 when towing the the diesel 9. Same load as above only this time for 75000 miles. The oil change costs will be the same as above. Diesel $5600 gas $2400. No major repairs on either. The diesel will use a cost a total of $113,166.65 and the gas 122,205.27 so a total difference of 9,038.62. The diesel could then be sold for $7,000 and the gas for $3,000 so a total difference of 13,038.62 so in the end you would likely break even. Personally if I'm going to break even I'm going with the diesel. Now let's say both are towing full time. Oil changes reduced to 3000 miles. 100 oil changes so $3000 for gas and $7000 for diesel. At 9mpg a diesel would cost a total of 160,666.67 to operate. A gas would cost $171,375.00 so the diesel would break even plus better resale value(both basically worthless). Diesel (in this case) would never run out of power in hills, etc. I realize that I may have missed some thigns that may tip the scales to gas but over all, long term, diesel makes just as much sense as gas. It liekly depends on how much towing you do.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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