Expedition Dave
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3,000K Fuel Report Part 'Tres'
**FX4, HD Tow, 3.73s, lifted 2-inches F/R, chin spoiler deleted, Nitto Terra Grappler (295/70-18s 34.3s at 10.6 pounds+ over stock wheels and .25 inch spacers) for an exact total combined of a 3-inch lift. Regular drive mode, 2wd, 87 octane, tire pressure ranged from 35-40 PSI when warmed up**
NOTE 1: My speedo is accurate with the taller tires based upon two GPS measurements (thank you FORSCAN) and I have adjusted my fuel reading meter to w/i less than .5 mpg accuracy--but I used actual math for the below measurements, NOT the computer measurement).
NOTE 2: YMMV, as a lot of this is based upon driving style. I am no "hyper-miler" but I do drive gently, consistenly, roll when I can but this is naturally and not constant fixation.
NOTE 3: My 3.73 rear-end ratio has been reduced to 3.49 (due to the 34.3 inch taller tires coming from a 32.1 inch tall previous).
https://www.intercotire.com/tire_size_change_gear_ratio_calculator
98% highway, outside temps ranging from 45 degrees to 88 degrees, with 850lbs of people and kit, I averaged 17.46 ACTUAL mpg (measured at the pump, not computer) over the 3000 miles stretch up and down the East Coast (last trip it was 19.29 mpg). A loss of 1.83 mpg.
Note, as usual there were some high winds, driving rains, and this trip had quite a few more stops in search of Dunkin Donuts on the return trip lol. Also, it should be noted on the return trip there was absence of passenger and her luggage & kit, and the cooler was empty--so overall approximately 300 pounds less.
My impression with the 17.5 mpg is that I wish it was more solidly in the 18s but I did do some well proven detriments to 1) vehicle aerodynamics (lift, no spoiler, wider tires, spacer) 2) rolling reistance (wider AT tires with more road grip), and driveline weight (heavier tires). And if you talk to the Toyota guys, they feel lucky to get mid 17's with stock full-sized 4wd Tundras, LCs, and Sequioas. Even the slightest mods seem to toss their MPG in the toilet.
I had seven (eight last time, I did delete 1-2 of them this time due to overlap with too much city driving) measured fill-ups during this period, trying to be consistent as possible and trying to find level ground at stations though this was not always the case.
If I had to guess, it was still 99% highway, very little idling, and still with several bathroom/coffee stops. There was some stop/go traffic as well and maybe 3 +/- full throttle on-ramp romps. Speeds nearly always ranged from 65-80mph, and if I had to average it I'd say overall 75 mph.
I do drive gently and do not know if I was running winter gas or not. I also noticed my "slow speed mileage" seemed off almost the same percentage (40-50 mph). I would recall seeing 27 mpg just dawdling along at those speeds, but now they seem to be 24-25ish. This part is less proven on my part though.
**FX4, HD Tow, 3.73s, lifted 2-inches F/R, chin spoiler deleted, Nitto Terra Grappler (295/70-18s 34.3s at 10.6 pounds+ over stock wheels and .25 inch spacers) for an exact total combined of a 3-inch lift. Regular drive mode, 2wd, 87 octane, tire pressure ranged from 35-40 PSI when warmed up**
NOTE 1: My speedo is accurate with the taller tires based upon two GPS measurements (thank you FORSCAN) and I have adjusted my fuel reading meter to w/i less than .5 mpg accuracy--but I used actual math for the below measurements, NOT the computer measurement).
NOTE 2: YMMV, as a lot of this is based upon driving style. I am no "hyper-miler" but I do drive gently, consistenly, roll when I can but this is naturally and not constant fixation.
NOTE 3: My 3.73 rear-end ratio has been reduced to 3.49 (due to the 34.3 inch taller tires coming from a 32.1 inch tall previous).
https://www.intercotire.com/tire_size_change_gear_ratio_calculator
98% highway, outside temps ranging from 45 degrees to 88 degrees, with 850lbs of people and kit, I averaged 17.46 ACTUAL mpg (measured at the pump, not computer) over the 3000 miles stretch up and down the East Coast (last trip it was 19.29 mpg). A loss of 1.83 mpg.
Note, as usual there were some high winds, driving rains, and this trip had quite a few more stops in search of Dunkin Donuts on the return trip lol. Also, it should be noted on the return trip there was absence of passenger and her luggage & kit, and the cooler was empty--so overall approximately 300 pounds less.
My impression with the 17.5 mpg is that I wish it was more solidly in the 18s but I did do some well proven detriments to 1) vehicle aerodynamics (lift, no spoiler, wider tires, spacer) 2) rolling reistance (wider AT tires with more road grip), and driveline weight (heavier tires). And if you talk to the Toyota guys, they feel lucky to get mid 17's with stock full-sized 4wd Tundras, LCs, and Sequioas. Even the slightest mods seem to toss their MPG in the toilet.
I had seven (eight last time, I did delete 1-2 of them this time due to overlap with too much city driving) measured fill-ups during this period, trying to be consistent as possible and trying to find level ground at stations though this was not always the case.
If I had to guess, it was still 99% highway, very little idling, and still with several bathroom/coffee stops. There was some stop/go traffic as well and maybe 3 +/- full throttle on-ramp romps. Speeds nearly always ranged from 65-80mph, and if I had to average it I'd say overall 75 mph.
I do drive gently and do not know if I was running winter gas or not. I also noticed my "slow speed mileage" seemed off almost the same percentage (40-50 mph). I would recall seeing 27 mpg just dawdling along at those speeds, but now they seem to be 24-25ish. This part is less proven on my part though.