Anybody that has read my posts on here knows that I have been a bit disappointed in my PreRunner's fuel economy (2.7L 5 speed manual). I finally reached the EPA estimated 28 MPG.
The only performance modifications that I have are an AFE drop-in High Flow Filter, and I removed the Secondary Air Filter (see my signature). Both of these mods were done in the last week. I am running my Dunlop AT20s at 39 psi all the way around. I run 89 octane with no ethanol and no other additives (aside from what comes with it). I get my fuel where ever it is the cheapest. I had nothing in the truck but me, a bottle of water, and a laptop.
The truck has 19,000 miles on it since I bought it in January 07.
The drive was between San Antonio and Giddings, TX. I was following my boss in his 06' Tundra DoubleCab Texas Edition. He loves to punch it, but he doesn't go over 75 MPH. I actually didn't have a problem keeping up with him when he punched it (which supprised me). The rest of it was just a cruise.
I had gotten 26 MPG out of the truck after the mods, but that was pushing it up to 80+MPH. The best I had seen before the mods was 25 MPG, and that was rare since I push my truck pretty hard.
I don't think these mods will have the same affect on the 4.0L V6, but I was impressed with the difference on the 2.7L.