I agree with the last couple posts. A few years ago I needed a truck and wanted a diesel. The problem - people were treating their diesels like gold. After separating the wants from the needs I opted for a F-250 V10. I paid $8K less than a comparable truck with a diesel. The V10 tows my 8,700 lb trailer just fine. The fuel savings argument is moot since diesel fuel is about .30 a gallon more than 87 octane. My V10 gets 8-9 when towing and 13-14 highway. My friends new F-250 with 6.7 diesel gets 16 in town and 8-9 towning. Granted, he's towing a 12,000 lb 5th wheel. But the point is, it will take him at least 100,000 miles to "save" $8k in fuel. But since his routine maintence outpaces mine he won't see any savings. Since I only put 5-7 thousand miles a year on the truck I expect it will rust away before the engine is worn out. Take some time to figure out if you NEED a diesel or WANT a diesel. If you aren't stuck on GM give the V10 a try. Just be aware that it's peak torque is at 3,200 rpm and peak HP is 4,200 but don't be afraid to spin it. P.S. I get better mileage towing with the tow mode on instead of leaving it off and letting it shift into OD. Good luck.