2.7L MPG

Santa Fe to Denver on 86 octane. Crushing.

 

I averaged 23.1 mpg over the last 532 miles with no freeway driving and mostly rural roads in third gear.

 

I get 24-25mpg in a 2013 access cab prerunner. It has 12k miles and I use pure synthetic oil.

 

Went 529 miles on a tank before the light came on and filled up 18.14 getting me 29.2 mpg!

 

I consistently get 23-24 MPG in my 2009 with flowmasters and K&N air filter. Mostly highway driving, but up and down in altitude.

 

Mountains can yield better gas mileage than hills.

Even though you are using more gas going up, there is more DFCO time, and DFCO time easily trumps any climbing because the gasoline usage is zero. You will always find the very highest gas mileage postings here are for mountainous driving.

Flatland trip gas mileage can't touch mountains, because although there is no heavy climbing, there's also no DFCO time and that's a negative.


Greg

 

Really? Hmmm. I have actually wondered about this. Let's do some math. As a very simple example, I will use a hill that is uphill for a half mile and then downhill for a half mile. MPG up the hill is, what, maybe 15 MPG? So that would come out to, uh, 30 MPG, average. So, you would get twice your uphill MPG? Yep, I checked with other numbers and it works out. And it does make sense. So it would be best to maximize your uphill MPG.

So is it better to have hills or flat? I don't know, I wanna go to sleep now . . .

OK, I can't sleep cuz I'm still thinking about this. I guess if your uphill MPG is more than half of your flat MPG, hills would be better. This really depends on the vehicle, conditions, etc.

How about, on flat ground, accelerate to some speed, DFCO to some lower speed, repeat. You would get twice your accelerating MPG, if you coast for the same distance that you accelerate. Again, how well it works depends on many things. But I think the general idea is good. ???

 

Oh no...something else to argue 'bout...lol

 

I live in a canyon and so am always on hilly rural roads. And the biggest advantage I've seen is when there is a short steep climb with a long downhill. Going down hill the DFCO kicks in and the mileage is technically infinite because no gasoline at all is being fed to the injectors. Depending on the road conditions, you could climb steeply for one mile, and coast using no gas at all for ten.

Naturally, all of that advantage is cancelled out if you return on the same road!


Greg

 

I envy you guys getting over 22mpg.I drive a 6 month old, mostly stock crew cab with a little over 10k miles on it and it can NOT break the 21mpg barrier according to scan gauge 2 and math. The only thing Ive done to my tacoma was install a solid tonneau cover,afe air filter and a dynomax super turbo muffler.I drive like an old lady on a sunday morning rarely going over 65mph. My daily commute is mostly flat terrain highway,70 miles a day. Any ideas? Someone told me I should have disconnected the battery after any mods so the computer can reset itself,Any truth to this?

 

those mods do not require any computer anything. so no truth to that. i think the real truth is your numbers, i don't believe half the shit on here about mpg's, my 4cyl was averaging about 16-17mpgs.

 

You can begin to assess your situation by considering these questions: Is your Pre an auto or stick? How many rpms is your engine turning at exactly 60 miles per hour? Has the size of your rims and tires changed from stock? What is the air pressure in your tires?

As far as disconnecting the battery, it never hurts to do it. So pull the negative cable for about 20 minutes just to see if your mileage changes.


Greg

 

its not necessary. im not familiar with that brandair filter is it oiled?? if so i would pull your maf meter and spray it down with some MAF sensor spray incase any oil from the filter has gotten on the element

 

So would mine if I just drove 5 miles to work or school and never got out on the highway.

 

I get around 20-22 in the summer for a 2005 Access Cab 4x4 I don't think that's too bad given that I drive with a certain....eh...uh..exuberance. In the winters it drops down to about 17-20 as I use 4wd almost daily for at least a couple miles, and more engine braking so I save my brakes on a big downhill stretch of my winter commute.

 

Well, the tonnou does nothing to increase mileage but does add weight. I doubt a couple hundred pounds will do much, but if you're running 21.9mpg it might get that last .1. After that, 21 may just be what your truck can get. Every mechanical device has an upper limit.

 

Thanks for the replies, Here is more info about my truck.Its a Automatic, At 60mph, RPM is at 1956 at 65mph around 2112 according to scan gauge. The type of air filter is a "dry" one made by AFE,no oil. The tires and wheels are stock,no change there. I did remove the secondary "charcoal" air filter that I read somewhere in this forum and the tires are inflated to 32psi. I do have a class three hitch bolted to the back.BTW its a prerunner crew cab, maybe all those great gas mileage I read here are either single/access cab non prerunners,IDK?

 

You have been fooled by Toyota's (and all automakers) ability to group very different vehicles under the same EPA rating. Doesn't matter if it's a 2wd 5-lug regular cab, or in your case the other extreme a 2wd pre-runner 4-door. All get the same rating.

Your truck weighs 600+ lbs more than a 5-lug regular cab, is 4 inches taller, larger higher rolling resistant tires, lower gearing, but identical EPA rating.

Nobody with a prerunner 2.7l will achieve the EPA rating without effort.

5-lugs easily beat the same EPA rating.

 

My 5 lug Access Cab with manual trans, will get 25 MPG on the highway anytime, driven under 75 MPH. If heavily loaded, battling a monster headwind at the same time, and driving a indicated 80 MPH, it will drop to 21-22 MPG. My best tanks are in the upper 27's. Every motor and induction system is different to some degree=YMMV

 

Had all time high 21.2 mpg last week on my 2014 DCSB. 50/50 city/hwy driving. Here in South Florida it's all flat though.