Will my gas mileage get better?

Getting really tired of seeing this crap. Do people who buy cars notice the big giant piece of paper on the passenger window stating they are going to get piss poor fuel economy? Obviously not.

 

ETHANOL is shit.
You will never get decent mileage with it.
There is alot less BTU content in the fuel.

This one of the greatest lies/ripoffs the public has ever been raped upon.

I still can get "good gas" and let me tell you there is a difference.
Corn syrup is for your food NOT your car.

 

most of the people that are giving the higher mpgs on this site are owners of different models...
whether its a single cab, access cab, prerunner, major mods, etc.
its not an equal comparison. find only the ones that match your model/year exactly. That will give you the most accurate comparison.
also, check the Fuelly website - great real world numbers there.

I noticed you have around 1000mi. -
remember, there is a break in period for your engine. There is a list of dos & donts in your owners manual for the first 2000 miles - I believe

TacoIdaho - Where does one get ethanol free gas ?

 

no

 

This is false. You cannot simplify it this way. 2000 RPM at 45 will be far better than 2000RPM at 75.

 

False, again. Weight is a huge component of fuel mileage. energy=1/2mass*velocity^2

Please do some research before spouting your BS.

 

thats what i thought

 

My mpg has gotten better since I've put some miles on the truck, over 6,000 now. Also idk if it's the 2012's that do this but when my gas light comes on i have used 16.3 gallons, which is an odd amount. Check out my fuelly and you can see how my mpg's have changed from the first fill up i did with it.

 

Then don't look at these types of threads...you won't have to see it then.

And yes, I saw the EPA mileage estimate...but if someone is getting way above or below it I'd like to know what they've done to cause it.

 

2010 DC auto 4x4 OR package

Stock 14-15 city, 16-17 combined, 20-24 all highway (got 24 only once going 55 drafting a big rig for a whole tank of gas)

After 2.5" lift and 285/70r17 Nitto Trail Grapplers

13-14 mixed, 15-17 highway probably 10-12 city.

 

No need to be an asshat about it. Yes, it really is that simple.

Just prove it...

(Your satement... Not that you're an asshat. You've already done that....)

 

You made the unbelievable claims, you prove it. Power output the same?, Wrong. You made yourself an asshat with your first statement.

It takes a lot more power to move a truck at 75mph than 45mph, engines don't make constant power output per rpm.

 

All city driving. First fill up.... 15 mpg. Get used to it. Highway driving, 20 mpg if your lucky.

 

ditto

 

So you say it takes a lot more power? How much? I know a lot of really gutless vehicles that are totally capable of going 75 that weigh more that my truck and have 1/3 of the power available... Are you talking about how long it takes to get there? What it takes to keep it there? Level ground, up a hill..? Come on man, you cant just make these claims and not back it up....


See the problem is that you're letting the whole idea of it being a "truck" get in the way of whats really going on in the engine compartment. It just happens that there are a lot more variables going on with a road vehicle. But all that really does is complicate the average that MPGs really are. Throttle positions change, engine power output and load change constantly so it really takes a computer to get the most accurate average.


Lets say you could meter the fuel delivery at any given in RPM. We'll need some units to measure this. Let say gallons per hour (GPH).
The engine will produce a certain horsepower value for any given RPM and to create that horsepower at certain amount of fuel is required. An internal combustion gasoline engine will consume about 1/2 lb of fuel per horsepower per hour. It's what is needed to maintain the optimal air/fuel ratio. As you know engine RPMs (horsepower output) vary drastically with driving an car or truck. So there are a lot of variables to take into account. So I'll simplify it....

To simplify what really going on you need to start with flat terrain with a constant load. That almost doesn't exist in the real world... Almost

Take a boat in a lake, for example. WHAT a BOAT??? But we drive trucks! Guess what, an engine is an engine, it doesn't know what it's in....

If the driver sets the power at 4000RPM. Lets say, at 4000 RPM that engine is producing 200 horsepower and burning 17 gallons of fuel per hour. That boat travels 40 miles across the lake at 40 MPH. Simple math will tell you that
the will take a little over 60 minutes to travel the 40 miles. And 60 minutes at 4000 RPM will burn 17 gallons of fuel. 17gal burned in 40 miles means that he got 2.4MPG...

Now put the boat on the river running WITH the current. All power settings (4000RPM) and distance (40mi) to be traveled remains the same, but the current is 20 mph. So relative to shore the boat is traveling 60MPH. It now takes the boat 40 minutes to travel the 40 miles while burning a total of 11.2 gal of fuel. In MPGs that translates to 3.6

Last time I checked 3.6 was better than 2.4... This is the same situation as driving your truck at 2000RPM at 45 vs 2000 RPM at 75.....

This model is for equilibrium only obviously doesn't account for parasite drag which is the next biggest variable. Which will vary depending on the whether or not there is a head, tail or no wind....

We can talk about acceleration.... Or what throttle position vs RPM really means?



Once again this is obviously simplified, but it illustrates the basic idea on how MPG are calculated. You have constant power changes that affect fuel flow. Throttle position changes that also affect fuel flow. It's all one big average. For averages to be most accurate with a bunch of outside variables the measurements must be taken over a longer period. Thats why figuring MPGs on only a few gallons and short trips will show different results than burning through a whole tank on a long trip.

 

Damn...all this time I thought I could divide miles driven by gallons used to get mpg...how am I going to keep track of acceleration percentages, throttle position vs. rpm, and whether my truck is the 'boat on the lake' or the 'boat on the river'...don't get me started on whether I need to figure out my parasitic drag...

Thank heaven for Fuelly. They must have all that stuff figured in...

 

Look, I don't have the time to tell you all the inaccuracies in your post. Here are a few things to read about.
Potential energy of a mass at speed. This formula is energy=1/2mass*velocity squared. This proves more mass takes more energy to accellerate to a given speed. This is why a lighter car does a lot better with around town MPGs.
Now read about wind resistance. The drag increases with the square of the speed (approximatly) and causes the largest change in MPG. The gearing is not as significant.
You say it's all abou the gearing? Well why can't I pedel a bike at 100mph even if I keep the cadence the same? It's due to resistance of the tires, but mainly wind. Mass doesn't affect top speed much, but does affect the time and energy required to make it to top speed.

Go read up on your physics.

 

Here in Boise, there are several Philips 66 stations that carry it.
Amazing that we even have to discuss "real gas".

 

I get it now, I have to be traveling with a 30 mph tail wind for this to work.

Come on man, you haven't backed up your claim with that logic.