When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
In over 60k miles of S2000 driving, I've averaged close to 24.5 mpg when driving on the street. I've entered every fill up and miles driven on a spreadsheet, but not in nearly as much detail as ralper.
As nobody mentioned, driving style has a lot to do with mileage. On the track, my old car averaged 11.0 mpg, and that includes some runs on the street to buy more gasoline.
Originally Posted by CoralDoc,Oct 3 2004, 11:51 AM
WOW ralper, and I though I was compulsive!
In over 60k miles of S2000 driving, I've averaged close to 24.5 mpg when driving on the street. I've entered every fill up and miles driven on a spreadsheet, but not in nearly as much detail as ralper.
As nobody mentioned, driving style has a lot to do with mileage. On the track, my old car averaged 11.0 mpg, and that includes some runs on the street to buy more gasoline.
Driving style is very important. I didn't include two additional columns to the far right where I keep track of any miscellaneous information such as if the fillup was during a meet, a group drive or an extended time on the freeway.
I suppose I am compulsive. I just like to know these things.
Amazing. In three years of ownership I've only calcualated mpg once! That was on trip out west with the cruise on. On a 100 mile stretch of flat-road in South Dakota with the cruise set at 71 mph, top up, air-conditioning on, the car averaged 32 mpg. As for driving around town, with my VETC'ing it seems silly to check.
I stopped for fuel a few minutes ago with two bars showing. I put in 9.893 gallons and had driven 280.2 miles. MPG?...28.323. This is the lowest I've seen since I purchased my S2000 three months ago. This tank included a bunch of city driving that I normally don't do. I offer this only because of posts here regarding fuel gauge calibration, mpg calculations, and number of miles vs. number of bars, etc.
I thought that you might be interested in how I track the M.P.G. of my S2000.
I set up this spread sheet. Every time I get gas I mark the milage on the charge card slip. When I get home I enter the date, gallons, price per gallon, ending milage and location. The spreadsheet does the rest. It calculated the mpg, the cost per mile, the average mpg from the beginning, the cumulative gallons used and the total dollars spent on gas.
I also mark the gas station where I purchased the gas. I do this in order to spot a trend. If I see that the mpg after a few tank fulls at any one particular station is lower than the average, I become suspicious that that stations pumps need to be recalibrated. Over the years, I've found that this theory is correct. No one tankful is an indicator, but over time the average mpg overall should be close to the average mpg from any one station.
Oh yes, I also keep all of the receipts. I have everyone since the car was new. Its part of the pedigree of my car.
What are the headings across the top? It's a bit hard to read from the picture.
If you want to "accurately" calculate your fuel mileage, you've got to:
1. Fill the tank, top off preferably.
2. Zero the trip meter
3. Drive the car
4. Top the tank again. Preferably at the same gas station and pump so the car is sitting at the same angle.
5. Divide the amount of gas you took into the number of miles you drove and you'll have a very close idea.
6. Repeat from step 2 if you want to continue the process.
How the fuel gauge is calibrated has nothing to do with it. In fact, you don't even need the fuel gauge. It's just there as a convenience. Guessing only leads to wildly inaccurate numbers.
I used to work for a car dealship. We had one lady come in complaining that she was getting 25 mpg on the first half of the tank and only 12 on the last half. Poor woman actually thought the fuel gauge was literally accurate. She didn't like being told that that wasn't the case. She was even more unhappy when we told her that there wasn't really anything we could do about it.
Originally Posted by EVAN_In_A_SPA,Oct 1 2004, 06:19 PM
I might have to check my tires soon.. I haven't checked them all summer.
Ya I need to do that too, I haven't checked mine in over 6 months, then it was b/c I just had the tires put on and wanted to be sure the psi was correct.
On the morning of the Carlisle drive back in July on a rainy morning on my way from the Valley Forge area to Carlisle on the PA TP I was tip toeing along around 65 MPH on my S-02's that where real close to the end and got 33.1 MPH (K&N air filter and Mobil 1 are the only non stock items)
Driving style is very important. I didn't include two additional columns to the far right where I keep track of any miscellaneous information such as if the fillup was during a meet, a group drive or an extended time on the freeway.
She didn't like being told that that wasn't the case. She was even more unhappy when we told her that there wasn't really anything we could do about it. 
(K&N air filter and Mobil 1 are the only non stock items)