What have you done to your 1st gen Tundra today?

I’m around 280 miles at a 1/4 tank remaining.

 

Yup. Looking at my gas logging app, I avg about 240 between fill-ups, most I've ever gotten is 333 on a tank, going back to 2019 when I started logging. That was a few thousand miles into getting the truck.

 

Yeah if I push it I get to 350. The best I do is about 15.6 mpg. But I always have a bed full of 300 or 400 pounds on those road trips. After the 33's, well see...

 

You'll lose 1mpg or more on added tire size/rotational weight alone, and lose another 1mp or more on odometer inaccuracy unless you yellowbox your truck. Expect lesser braking experience slowing down the extra rolling mass, and don't expect the cruise to work in even slightly hilly interstate stretches. It's markedly better for me after dropping from 285/70r17 down to to 275 with virtually no detectable visual appearance change. but still notice it.

Fortunately for your 2004, yellowbox is a plug-and-play no-splice experience.

 

I've yet to break/see 250. Fillups around 1/8 tank. I always forget to add 3.7% for my 265s, but I have yet to break into 12mpg. Thirsty girl.

 

Sometimes I see these numbers from other people on here saying they get 17mpg-18mpg on their V8/4WD and I'm .... like, "wtf? what kinda driving are you doing?" and I'm wondering if their odometer is broke, or maybe they failed math. At first I thought it was a year thing, like maybe the earlier years were more efficient than my VVTi era truck.

I get it, a great deal of my driving is stop-and-go and that kills mpg. When I do straight-up internet driving at 80mph for long distances exclusively, I can usually break into the 15s, once or maybe twice over the years hit the 16s. But I'll never hit 18mpg. I can hold the pedal at 65mph, which watching the MPG specs on my OBD tool seems to be the sweet spot for mpg, I'll still never get close to 18mpg.

 

Your driving habits are definitely part of that lol. But I can't say I blame you. You running premium?

 

May gas light came on at 259 last night, adjusted for tires it's 282. I'll take it. Lol

 

So only a few thousand miles ago

 

I averaged almost 20mpg on a trip from Modesto to Napa and back one time.

 

If I don't get stuck at any lights on my 15 miles commute, I can get up to 16.5mpg in the gordita. The racetruck can do up to 19.8mpg.
On open highway the gordita gets like 12-15mpg, depends on how hilly and how fast. The racetruck typically gets between 17-19. Best I've ever gotten was 19.8 on the way to work and again on the way to visit the SATX crew. I suspect a lot of that is due to less wind resistance since I lowered it 2/4 and have a bed cover.

 

I started the CB radio installation. Mounted the antenna. Had to go with a shorter one as the the taller one didn't clear the garage door opening.

 

I accidentally discovered the sweet spot for our 2009 Lexus RX350. We were driving 60 MPH on the interstate waiting for friends to catch up. I looked down at the built-in trip computer and it was showing 30 MPG for the 3.5L V6! Holy smokes! My wife will not let me drive that slow, though.

 

Anything around 55-60mph will be the most efficient. Especially if the transmission gets into the tallest OD gear. Over 60mph and wind resistance starts to compound.

 

I calculate the diameter difference between stock tires and the ones I'm currently wearing and get a diameter difference calculated in percentage. https://www.calculator.net/tire-size-calculator.html
But we have to know what size tires it came with from the factory. I think my 2004 RCLB came with taller tires than my 2006 RCLB because it has the tow package. Another thing I like to do is drive the interstate and watch for mile markers, then push the tripometer.
If we don't figure in the fact that we're going farther than the odometer admits, we think we're getting worse mileage than we really are.
Does anyone know what tires they came with new? I'm pretty sure my base model 2006 came with 245/70R16 and I'm guessing my 2004 with tow package must have come with 245/75R16.

 

I once broke 300, using premium non-ethanol, all highway. I think I got 17.something mpg that tank.

It's just a hunch, but I think the fact that I sold my Tacoma with 330,000 miles and the original fuel pump is because I very, very rarely let it get below 1/4 tank. Like maybe 5 times. Gas is what cools the pump, and at least what I've been told is that once you drop below 1/4 tank, the pump is getting exposed and gas can't cool it. No idea if it's true.

 

It’ll be on the door sticker. My TRD OR came with 265/70/16s

 

The sticker on your door jam typically has the factory tire specs. At least on my other Toyotas it has. Haven't looked on my tundra.

 

I usually just reset the trip computer when I fill up, but I should probably start using an app and calculating the difference for my odometer with the 34's I have. When I bought the truck it had a pedal commander installed, and on any of the increased throttle response settings cruise control was completely unusable.

 

Yup, gotta run 93. Kinda sucks since there's only 1 station with 4 locations that have 93, minus the race gas place. I need to start carrying octane booster in the trunk JIC.

 

You know, that's kind of interesting. I'm pretty sure my sticker says 245/70/16, but it's always had 265/70/16s since I got it. 245s didn't come on patricks, did they?

 

They did on non-TRD OR models

 

You ever run race gas?

 

$$$ with no appreciable benefit

 

Nah, cause the math doesn't add up.

 

@shifty` You made me go back and check my math! Top arrow is the trip odo reading for the last leg of interstate home. Next arrow is total miles on the truck. Third is (obviously) the gallons to top it off. Fourth was the total trip odo. 130.1 mi / 7.241 ga = 17.96 MPG.

The 02 AC is running 265/70-16 Michelin LTX A/T 2s (need to be replaced soon). The truck is being garaged while I have it, so I set the tires to 32 PSI at 70 F temperature inside the garage. (I would have to park it outside with 50 F overnight temps for the duration of the trip. The interstate was moderately hilly. The only other possible advantage is that I installed that Truxedo tonneau. With this truck, I really tried to set the cruise on 70 MPH as much as possible, but traffic was not always cooperative.

 

Not yet. I need to get the tune figured out first. plus 450hp is about the max for the 4.6 so I don't wanna push it much further. However, Haltech is an Australian company, so I've been chatting with some Aussies on the bookface about doing a remote tune.

 

I honestly think that inclines and declines also play a big role when you get low on gas. I've driven my toyotas to damn near empty a few times. The only time I got a p0171 that I suspect was the fuel pump was when I drove my taco in the hills with the gas light on. I had to go up a big hill to get to the gas station and the truck almost stalled as I pulled up to the pump. The CEL came on a few weeks later on a road trip.

 

But he's got a supercharged racecar