MPG check plz

Im on 295/60r20s so 34's and I use 1.05 for my hand calc. I get about 15.5.
I'd change the diff fluid and see if that helps.
Also what's your elevation?

 

Since when do we care about mpg’s? As long as it’s running good don’t worry about it

 

Makes sense. Thanks

 

My summer average in my unmodified '20 TSS DC 4x4 is 17-18mpg. Winter average in the coldest month (very cold) is 13-14mpg.

 

This was after I replaced knock sensor harness and some new rubber.

6” lift, Toyo Open Country AT3 (35”)…
Gentle on the go pedal. Lots of hills and twisty roads. Some city traffic as well.
It does better once trans temps stabilize. Saw 20.2 mpg on the same drive a few days later with a fully warmed tranny.

lay off the fun pedal!

 

I never trust the computer, always do my own calcs. Just did a 360 mile round trip, all freeway. Computer said 17 mpg, my calcs were 19 mpg.

 

Wow. That’s organized!

 

Thanks. I started doing that a long time ago and just never stopped. Ends up being interesting data to have.

Every single fill-up, I write down the odometer and tripometer on the receipt, then reset a tripometer. Then just fill out the spreadsheet at some point when I get home.

 

super organized! Is there a particular reason for doing it ie information for when if/when you sell it or for business miles expense? I drive a lot ~10k miles a month it’d be hard to keep track of every single fill up miles etc..

 

Nope, just personal interest, watching for trends after random events, etc.. It's interesting to see it all put together after a while.

 

I have been doing something similar for decades. I don't care about the tripometer, just the odometer, as my spreadsheet does the tank calculation for me. I am basically interested in MPG for the fill-up and then historic average. All I need is the receipt from the pump on which I write the odometer reading.

 

Yep, I've been doing it since 2007 when I bought my first Tacoma.

 

My GPS regularly reports 3 mph lower speed than on the indicator. My speedo says 65, gps says 62. So, how does this affect mpg calcs? Should I delete x% of mileage? or ?

 

65/62 = 1.048, so multiply your mileage by ~1.05 for your true mileage (and speed). It means you're going further than the truck thinks it's going, so you're getting better mpg.

 

Don’t Toyota had a lawsuit b4, ripping people off on their warranty, cause Speedo not right.

 

No idea, seems like a hard claim when your speedometer is only truly accurate at an exact tire diameter. Tire pressure, size, tolerances, etc all affect it obviously.

 

I check it, it was 9% off…maybe Toyota trying to see at what % customer will notice and file lawsuits…

 

You're on stock tires? I think my Tundra is the first vehicle I've owned that didn't read 2 kph high on the speedo.

 

Hmmm, the GPS says I'm not going as fast as my speedometer, GPS says 62, truck says 65. my son's Tundra is the same. mine's a 2011, his a 2007, we're on original size tires both of us. So, I was thinking we were actually going less mileage than it was indicating, so it's be 62/65 = .954 right times mileage/speed. which gives me less mpg if I'm thinking correctly on this word problem.

 

U are going slower then speedo, that’s mean you get more mileage then you actually drove..
Just think of it this way. You drove 1 hr speedo read 65 miles, you actually drove 62 miles.

 

Oh, I thought you were saying you were going faster than you were. Yes you're correct, your doing worse mpg

 

Too much faith in a GPS as they are NOT always correct. Get gas, reset the odometer and do old school math next time you fill up. Either way the Tundra is horrible as to gas mileage!

 

Unless your tires are not the stock size…then your speedometer and odometer readings are off, negating any calculations.

 

My 2015 CM got 12mpg when I bought it a few months ago. Fuel pump was shit. Got a new fuel pump & car drives 100x better and mpg hovers between 15.5-16. All checked with hand calc, never more than 0.3mpg off. All stock.

Dealership can check your fuel pressure & fuel trims.

See this thread: https://www.tundras.com/threads/p0171-p0174-those-pesky-lean-codes.32110/page-2#post-2276120

Check the last few pages for relevant TSB numbers. I was outside the emissions warranty coverage due to mileage, but you're not, if your fuel pump turns out to be an issue.

 

Here's my MPG. Last tank is first tank with lift.

 

I average 10.5 city on 35s but didnt buy a tundra for the mpg