Any good data logger for the G?

 

G is ODBII right?

You can get a cheapo ODB-II to bluetooth dongle on ebay, and Im sure there is some s/w out there for a laptop (but Ive never used the software so I dont know).

I was looking into the wireless adapter and an app for my Android phone, there are a few of those to choose from as well (Torque is free and there is one more that is a paid solution but with much better features, they were supposed to come out with their bluetooth version for Android in the 1st quarter of this year).

EDIT: Torque can datalog so if you have an Android phone, the app is free and all you need is the dongle (look for an ELM327 based dongle). The full paid solution coming out is by GoPoint technologies, scheduled to release Q1 2011. Not sure if you can just grab the app from them for free (since its Android) and then use any dongle, or if theyve somehow made their own proprietary adapter that forces you to buy their version.

 

Yep, all of this makes sense.... Ah but in the North east, we have Winter Blends of gas (more ethanol, I believe). That will affect the MPGs !!! For a brief comparison for City driving - that terms has differenet meanings too - using our 2010 Honda CRV -driving a few blocks, then stop, then go, a few blocks,etc.... reset the mpg usage - 10.8 to 12.2 mpgs - 4 cylinder engine in cold weather over a 2 -3 miles on the way home. That's steepin on it... baby the throttle a little, might see 14-15.5 mpgs on the same trip.

 

for those really into gas mileage check out truedelta.com you can see mileage for other makes and reliability data entered by members. cool real world stuff

 

i was really disappointed with the fuel economy...youd think a v6 would get better

 

lol am i the only one with 13.4, and thats better then 12.9 that i had

 

We have winter blend in TX, also! They don't vary the ethanol, as it must contain 8-10%(toptier gas site), but vary the actual base stock to change vapor pressure and a few other properties so that it burns better in the cold. If winter gas is used in the summer, it will create more pollution. Car engines have a lot of trouble burning summer gas in the winter.

People tend to idle their cars more in the winter. Since an earlier idling thread, I have noticed that I will idle just a little longer when it is colder out. I must have a subconscious urge to drive a toasty car.

 

This is strange...according to the EPA website describing the gas guzzler tax, the G37 sedan RWD with 7AT just squeaks by in not being taxed, while both the G37 and G37x sedan 6MT should have a $1300 gas guzzler tax:

Gas Guzzler Tax: Program Overview | Fuel Economy | US EPA

but the guzzler tax isn't charged on the 6MT, is it?

The numbers: [Late edit: see 2 posts down for revised/corrected numbers]
G37 sedan 7AT MPG 19/27, so the combined number to base the tax on is 55% of 19 + 45% of 27 = 22.6MPG (just clears the 22.5 MPG threshold)
G37 6MT rated at 17/25 gives 20.6 combined
G37x 6MT rated at 18/25 gives 21.15 combined.

and the tax table reads:
Combined fuel economy of:
at least 22.5 mpg, No tax
at least 21.5, but less than 22.5 mpg $1000 guzzler tax
at least 20.5, but less than 21.5 mpg $1300 guzzler tax

 

You missed the key point, which I have quoted below, and is a little confusing if you read too quickly. The tax is based upon the raw numbers, but the sticker value is adjusted for the real world. This is why MPG 2008 and after dropped and could not be compared to earlier values until they were recalculated.

From the link you gave:

"EPA and manufacturers use the same test to measure vehicle fuel economy for the Gas Guzzler Tax and for new car fuel economy labels. However, the calculation procedures for tax and label purposes differ, resulting in different fuel economy values. This is because an adjustment factor is applied to the fuel economy test results for purposes of the label, but not for the tax. The adjustment is intended to help account for the differences between “real-world” and laboratory testing conditions.
EPA conducts fuel economy tests in a laboratory on a dynamometer (a device similar to a treadmill). Laboratory conditions can be different from real world conditions for such parameters as vehicle speeds, acceleration rates, driving patterns, ambient temperatures, fuel type, tire pressure, wind resistance, etc. EPA studies indicate that vehicles driven by typical drivers under typical road conditions get approximately 90 percent of the laboratory test-based city miles per gallon (mpg) value and approximately78 percent of laboratory highway mpg value. This difference is referred to as “in-use shortfall.” To account for the in-use shortfall, the city and highway mpg values listed in Fuel Economy Guide and shown on fuel economy labels are multiplied by 0.90 for the city test and 0.78 for the highway test. However, the combined city and highway fuel economy that is used to determine tax liability is not adjusted to account for in-use shortfall, so it is higher than the mpg values provided in the Fuel Economy Guide (Fuel Economy) and posted on the window stickers of new vehicles."

 

That explains it; thanks

For sedan guzzler tax purposes then, the G37 6MT is based on 24.8 MPG, the G37x 6MT is based on 25.4 MPG, and the G37 7AT is based on 27.2MPG. All well above the 22.5MPG tax threshold.

 

Not much, only 79.5 mpg...
took this pic last night...



.. jk IDK how i got that 79.5 mpg. I always get like 12.1 in nyc traffic all day. max i get local is 12.9.

 

I got about 15-17 MPG in City and about 20-22 Freeway...and I don't drive aggressively. I just bought something called the fuel injector bottle and it says it can generate more miles.. Let's see..

 

Mine avg is about 17.5mpg most local drivin

 

I have 2,200 miles on mine, I will change over to synthetics at the first oil change and then I would expect an increase. I am averaging 23-24 on the highway if I maintain a consistent speed but it's closer to 21 if I feel a need to pass someone.

I'm trying to find the ideal speed it wants to be at for the best gas mileage. For the 350Z it was 80MPH. I was able to get 28 highway on that so I think I will wind up with an average of 23 once I switch to synthetic.

 

how long do i have to spend on the highway in order for my econ to change because mine always says 14.8 at most 15.0 even if i am on the highway