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Originally Posted by Guinnessboy
already do both....sticking with shell gas as well, but 87 like the 6.0 is suppose to take.
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You should try running a few tanks of V-Power and see if you notice better MPG. The truth is, most vehicles say to use regular unleaded, but there is DEF. a difference. When running regular your engine pings and knocks, starves for power, and downshifts MORE. When it downshifts more, its using more rpm's which uses more gas so while you maybe saving a buck at the pump, your not going as far on a tank of gas so when you weigh it out, what are you really saving?
Not bashing you in anyway.......if you want to use regular thats fine, cause a lot of people do.......but everyone seems shocked at my mpg figures so I am just explaining how I achieve those numbers.
I dont know how you and everyone else drive......but there is a difference on how people drive, and I will give you a example......with me, I take off slow, get it to around 1900--2000rpms and let it shift, but if you compare my driving to my brother.......when he takes off, he lets his get up to around 3000rpms and shifts (Jack Rabbit Take Offs)