Last post on Jul 06, 2013 at 3:20 AM
You are in the Toyota 4Runner
What is this discussion about?
Toyota 4Runner, SUV
#10333 of 11429 Re: 2005 4 RUNNER [shtirlitz]
Dec 12, 2004 (1:58 pm)
First off it is obvious you don't know what you are talking about. I am almost sure thast you do NOT own a 4runner. I would suggest that you do some consumer research before you come on this forum and guess about gas mileage.
With that said, I own a 2004 Toyota 4runner SR5. I live in (very hilly) Pittsburgh, Pennsylvania. I leave my V6 SR5 in 4 wheel drive all the time for extra traction, and in the 4runner there is a computer that monitors my gas mileage. Here is what I get:
I average 19.3
75% of that is city driving
25% of that is highway
I also use high octane gas from Costco
I have 13,000 miles on the vehicle and absolutely no problems with the engine.
I consider my average mileage to be great considering it is an SUV, and a great one at that!
#10334 of 11429 2005 V8 4x4 GVWR Tax law
Dec 12, 2004 (10:07 pm)
I have ordered the 05 v8 4x4. It should be in in the next 2 weeks. Anyway the new Gross Vehicle Weight Rating is 6005 lbs on this model. Under the current tax law Code Sec 179 I can now write off about 37K of the estimated $40K price. Has anyone looked into doing this, if not and you can buy one before the end of 04 it is a good idea.
Just wanted to see if anyone knows much about this and the overall performance of the 05 V8 engine?
Dec 13, 2004 (7:44 am)
Hi all! Before it gets too hot in here, perhaps consider the following. The gas mileage between two absolutely similar vehicles may vary substantially due to:
1) brand of gas
3) ambient temperature
4) use of A/C
5) tire pressure
6) driving style
7) city or highway driving in % to each other
7) average driving distance per trip
8) how loaded your vehicle is with your stuff and/or passengers, and even how much you weigh yourself - a 100 pound difference between two people is not unheard of these days, and the heavier guy would pay the price at the pump
8) the time of the day you fill up (when it's hotter, you get less gas for the same amount of money, as it expands)
Plus, I've never heard of a computer which monitors gas mileage giving lower MPG numbers than the actual consumption. I have, however, read on very many occasions that the computer usually gives a rosier picture by about 2 MPG.
In light of the above, no need to argue, let's be friends
#10336 of 11429 bcmalibu99ls
Dec 13, 2004 (10:08 am)
Gasoline tanks are buried in the ground, below the freeze line. This ensures a fairly constsnat year round temperature of about 55 degrees F as I rember from my spelunking days in college.
Caves are 55 degrees year round. I'm betting that gasoline is about 55 degrees year round, too. It will expand after you buy it in the Summer. It may contract if the temperature is colder than 55 degrees F. in the Winter.
It sure gets colder than that in the Winter where I live. How else would I know about fenderbergs.?:
I have noticed when I first fill up, and reset my dashboard gas mileage computer, it usually reads well over 20 MPG in city driving for a few miles. That may be one of the reasons it ends up with a high reading over all. It starts out very high, then ends up about 2 MPG high, when it's time for another fill up. Just a thought.
#10337 of 11429 Re: bcmalibu99ls [pat84]
Dec 13, 2004 (1:01 pm)
It will expand after you buy it in the Summer. It may contract if the temperature is colder than 55 degrees F. in the Winter.
I just had to check that out and was surprised to learn that gasoline has one of the largest thermal expansion coefficients of any material. The volume of gasoline will increase by about 0.1% for every degree Celsius increase in the temperature.
Roughly speaking, if the 20 gallons in your gas tank warms up 20 degrees Fahrenheit then its volume will increase by about 0.2 gallons.
#10338 of 11429 Mileage & trip computer variations
Dec 13, 2004 (5:01 pm)
bcmalibu99ls, that was a good post. Your suggestions prompted me to think of a couple more.
Frequent cold starts (short trips) vs longer trips--The engine is set to run rich when cold, and if you did a lot of 2-5 mile trips in cold weather from cold starts, that could cost you significant mileage.
Uphill/downhill vs. flatland driving--This makes a big difference in a heavy vehicle (especially where hills are steep and you can't just coast down) where you burn gas going up and burn brakes going down.
And of course, one person's "city" driving isn't the same as another's. The EPA has a standard city loop, but the rest of us don't.
As for my MPG, (V6 mostly in 2WD mode) I've had city driving with frequent passengers that dropped me down into the mid 15s. I've had highway driving in mostly flat terrain at speeds of 65 and below that that was up above 24 MPG. These are actual measured (not trip computer) values.
As for the trip computer, it's a simple matter for it to keep track of the varying pulse width used for the injectors and estimate instant and total fuel flow pretty reliably. It seems like Toyota is doing what most others do, and calibrating the computer a known amount optimistic. I'll bet if you subtracted 2.2 MPG from everybody's trip computer readings, we'd all be marveling at how accurate the 4Runner trip computer is!
#10339 of 11429 Gas expansion and contraction
Dec 13, 2004 (8:51 pm)
The gas tanks at the gas stations may be buried and at constant temperature, but I've read on quite a few occasions that it is better to fill up either early in the morning or late in the evening, especially in the Summer, as you'd be getting more gas for the same amount of money.
For the same reason (contraction and expansion) it is highly NOT recommended to "top up" when you fill up, especially in the Summer. If there's absolutely no space left in your gas tank and gas expands when the temperature rises, the gas tank might eventually start leaking
#10340 of 11429 Re: Gas expansion and contraction [bcmalibu99ls]
Dec 14, 2004 (5:46 am)
Why do you think it says not to top off your tank.
The emissions (fumes) from gasoline have to be contained and are done so by a small charcoal canister usually in the engine compartment. So every time you top off the tank to the next dollar value all you are doing is sending gas directly into the canister. Then instead of vapor you have gasoline spilling on the ground. Any additional pressure (from gas expansion) will be vented overboard thru the charcoal canister.
In short it's not good to overfill your tank.
#10341 of 11429 Re: Mileage & trip computer variations [corancher]
Dec 14, 2004 (9:53 am)
Great post as well as the one by "bcmalibu99ls".
I guess after all I am not the only one on this board who tries to be realistic about the fuel consumption and "computers".
#10342 of 11429 Re: 2005 4 RUNNER [shtirlitz]
Dec 14, 2004 (10:14 am)
If you were given the keys to a new V8 powered 4Runner that was not your own, how would you drive it?? The editors at Motortrend have always admitted that they drive the vehicles they test very hard. I do not believe those numbers are a good real world estimate at what you can expect to achieve. FYI, I do not rely on the trip computer for my mileage readings. I keep track each tank, and the numbers I have reported reflect mileage that was determined on usage over the life of a tank, not the computer.