Fuel Economy...WTF?

Cjanik · 07-03-2009, 07:52 AM

dont use the computer trip/mpg to calculate, instead, fill your gas to full, reset your trip mileage, then fill up again when you run low on gas and divide the miles you drove to the gallons of gas you just filled your car with.

that should be more accurate. my tacoma gets 19mpg average, so i dont see why the Z should be getting worse.

frost · 07-03-2009, 09:49 AM

Quote:

Originally Posted by Cjanik

dont use the computer trip/mpg to calculate, instead, fill your gas to full, reset your trip mileage, then fill up again when you run low on gas and divide the miles you drove to the gallons of gas you just filled your car with.

that should be more accurate. my tacoma gets 19mpg average, so i dont see why the Z should be getting worse.

Not a bad idea to at least test how accurate it is. My drives are always a bit longer, but I never get under 25mpg fwiw, and I drive like a nut.

GMZ · 07-03-2009, 10:04 AM

Quote:

Originally Posted by Cjanik

dont use the computer trip/mpg to calculate, instead, fill your gas to full, reset your trip mileage, then fill up again when you run low on gas and divide the miles you drove to the gallons of gas you just filled your car with.

that should be more accurate. my tacoma gets 19mpg average, so i dont see why the Z should be getting worse.

This ^ I got 19 mpg combined in my 4Runner as well. I stopped calculating mpg, my new method is time between fill ups. 1/2 tank per 2 full weeks is a good amount for me.

Zcott · 07-03-2009, 10:11 AM

For what it's worth, I never trust the trip computers so I always to the math on my vehicles (just a habit).
My first two fill-ups the computer was dead on to the tenth.
22.5, and 23.3.

I've found that how I drive around town profoundly affects the mileage.
(I know, not a revelation)
Lord it's hard to stay off that pedal at lights!!!

dszombiex · 07-03-2009, 10:56 AM

I just started gathering data. Here is what I have so far...

TheWeatherman · 07-03-2009, 10:58 AM

Hey Spear... From what I've found with my '09 FX35 and this, the VQ motors don't start getting their best mileage until they are fully warmed up. When I just have my 15 minute trip to work, your mileage is close to what I'm getting. Once both of them are warmed all the way, the mileage goes way up. Just an observation for what it's worth.

spearfish25 · 07-03-2009, 11:51 AM

Quote:

Originally Posted by TheWeatherman

Hey Spear... From what I've found with my '09 FX35 and this, the VQ motors don't start getting their best mileage until they are fully warmed up. When I just have my 15 minute trip to work, your mileage is close to what I'm getting. Once both of them are warmed all the way, the mileage goes way up. Just an observation for what it's worth.

Yeah, the car runs great so I'm with you guys on thinking it's engine temp related.

First it was oil coolers, now it's going to be engine block heaters...LOL

Forrest · 07-04-2009, 02:40 PM

Quote:

Originally Posted by Zcott

For what it's worth, I never trust the trip computers so I always to the math on my vehicles (just a habit).
My first two fill-ups the computer was dead on to the tenth.
22.5, and 23.3.

I've found that how I drive around town profoundly affects the mileage.
(I know, not a revelation)
Lord it's hard to stay off that pedal at lights!!!

i have tested the trip computer multiple times it is pretty darn acurate, infact its acurate enough i dont have to test it the old fashion way any more.

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07-03-2009, 07:52 AM	#1 (permalink)
Cjanik Track Member Join Date: May 2009 Location: Las Vegas Posts: 578 Drives: N/A Rep Power: 19	dont use the computer trip/mpg to calculate, instead, fill your gas to full, reset your trip mileage, then fill up again when you run low on gas and divide the miles you drove to the gallons of gas you just filled your car with. that should be more accurate. my tacoma gets 19mpg average, so i dont see why the Z should be getting worse.

07-03-2009, 10:11 AM	#4 (permalink)
Zcott Base Member Join Date: Jun 2009 Location: D/FW, Texas Posts: 89 Drives: 09 370Z Sport PG M6 Rep Power: 18	For what it's worth, I never trust the trip computers so I always to the math on my vehicles (just a habit). My first two fill-ups the computer was dead on to the tenth. 22.5, and 23.3. I've found that how I drive around town profoundly affects the mileage. (I know, not a revelation) Lord it's hard to stay off that pedal at lights!!!

07-03-2009, 10:58 AM	#6 (permalink)
TheWeatherman Enthusiast Member Join Date: Mar 2009 Location: Milwaukee, WI Posts: 265 Drives: 2009 370Z 6MTw/Sport Rep Power: 18	Hey Spear... From what I've found with my '09 FX35 and this, the VQ motors don't start getting their best mileage until they are fully warmed up. When I just have my 15 minute trip to work, your mileage is close to what I'm getting. Once both of them are warmed all the way, the mileage goes way up. Just an observation for what it's worth.