Re: 19.8mpg after HC removed!
Too many variables to cover in one post. You have to consider wind, road grade, speed, summer vs winter gas, etc. Unless you do back-to-back runs in identical conditions it is not a valid comparison.
Bottom line is the battery disconnect trick will only give a temporary increase in mileage. For maximum benefit you need to do this on a warmed up engine, then immediately start driving gently after reconnecting.
The reality is the only way to increase your mileage long term is being gentler with your right foot. I regularly get 17+ around town, but I can suck it down to 14 pretty quickly if I want to.
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07 DC SR5 TRD 4x4 5.7 TRD exhaust, 46K miles, 17 mpg city after battery disconnect reset. Truxedo Lo-Pro with deck rails. Front Susp: Stock coilovers, 4" lift ( http://www.tundrasolutions.com/forum...6-4-inch-lift/), swapped extra spacers for Bilstein 5100s on lowest setting, wheel well height still 41.5." Rear Susp: ProComp ES3000 #326510 (2.25" taller than stock), 1.25" blocks plus PRG mini-pack ( http://www.tundrasolutions.com/forum...and-new-truck/) gives 2.25" total lift, parking brake cable bracket spacers, wheel well height 43." Front diff and rear ds drop; trailer hitch electrical harness tucked up above bumper. After 20K miles swapped 305/65/18 BFG AT for 285/75/18 Toyo AT, still on stock 18x8x60 offset TRD wheels, about 1/8" clearance to sway bar. Like the extra height but miss the width. Next time either 305/70/, 295/70, or 35x12.50/18. Added 5th 285/75/18 Toyo AT as spare. Bed Bounce: Stiffer E-tires are worse than stock P-metric; biggest improvement from PRG mini-pack, slight improvement from shocks. Still a stiff ride but tolerable now. Best things about this truck: 5.7 and transmission, interior size and comfort, very quiet at high speed. Worst things about this truck: bed bounce, no VSC in 4wd, mileage sucks above 70.
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