you want to talk about FALSE advertisement!!! diesel will beat gas in any challenge! show me what vehicle got the same mpg either gas or diesel. i just took a 4400 mile trip hauling a helicopter cross country with m dad(using his 91 chev 2500 GAS) loaded we got 7. 5 mpg and barely pullled the hills at 30mph. unloaded we got 12. 5!!! after we arrived back from our trip, i had convinced him to get a diesel. needless to say he bought one a few days ago. my truck gets 16mpg loaded. do the math and tell me which one is cheaper. And for the record diesel is cheaper that gas at the pump.