Only 150mpg's? I regularly get over 250-300 mpg when coasting especially on a long hill according to my scangage. I pulse and glide as much as I can (traffic permitting) . Sometimes I blip the trottle when putting into gear to match the rpm but is not always necessary, you need to know your vehicle's quirks. I get the best mileage when I pulse and glide verses holding a set speed. ymmv. ChumlyUnless the hill you're coasting down is quite long and engine braking would slow you down too much, there is no benefit to shifting into Neutral. Downhill coasting in Neutral gives you roughly 150 mpg. Downhill coasting in gear shuts fuel off to the engine so it's functionally unlimited mpg.