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2,164 Posts
i have an 01 HO 6spd dually, and cant get above 16 bought it in oct, so ive only seen winter blend. thought i had my programmer set up wrong, still nothin, st8 pip, and BHAF, atill about 15.8 hand calculated i also run diesel supplement (white bottle) and howes anti gel. i would love to get better mpg's. but my 04 only gets 10mpg, so it beats that at least! 
