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Where i drive is all long hills so I come up the hills at a steady throttle and let the car slow down till almost the downshift point at the top, letting it lug down a bit. then if there is no one behind me I am going about 15 mph below the speed limit and let the car or truck accelerate down the hill, as I've started at a speed below the speed limit I'm pretty safe to let it fly, , I just let it coast until I would have to go into third gear if I let it slow more, sometimes can coast a mile or more ,one hill about 2.5 miles, that's why I need to rig up an aero brake so I can control speed without wear and tear, luckily not too much traffic when I go to work at 5 am and come home late, so easy to experiment best Ranger MPG so far was 30 with new O 2 sensor and fresh oil change, etc, pushing around 27.5 now with grille block and this technique,
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