depends on miles, driving habbits, towing and maintenance. I can say from me, I usually do my own maintenance and I use the truck for towing/work . I wanted diesel, but the math # and seeing as I use the truck as a truck, diesel would have been cheaper based on mpg and driving if I kept it for 14 years... i still paid over 50k for a gasser and it didnt even come with a volume control on the wheel. i have serious doubts it will still be running after 5-6 years so my math and reasons are out the window. ill update when I sell it