What MPG are you getting after going F.I.

Chuck33079 · 04-26-2013, 08:03 PM

Quote:

Originally Posted by Z370Z011

Isn't ethanol cheaper though? Might compensate for the extra gas if its cheaper.

Maybe, but you need to go bigger on the fuel system for ethanol. It's a trade off. E85 is good stuff if it's readily available around you. He was asking about E10, and that's hard to avoid.

m3chhawk · 04-26-2013, 08:46 PM

Ethanol has a much lower energy content than gasoline (~115k BTU/lb for gasoline vs ~70k BTU/lb for ethanol). So ethanol will always hurt your fuel economy.

That being said, you can make more power on ethanol (~105-110 octane), but you need to at least tune for it and ideally build (higher compression) for it and you will likely flow 30% more fuel to make equal power.

Nixlimited · 04-27-2013, 02:14 AM

Ethanol is a great big ripoff for consumers. It's government subsidized despite it being an inferior and less efficient fuel. It does have a higher effective octane, but when you go to the pump and buy gas cut with 10% ethanol, like in CA, you are basically buying watered down gas, which will impact your mileage.

DIGItonium · 04-27-2013, 02:30 AM

Good point. No wonder during the 6 years of ownership with the 350Z at some point the car stopped feeling as peppy and a full tank didn't last as long. Around that time not all pumps were required to put the 10% ethanol notice. It's everywhere, and it's not really saving us much money. [END RANT]

Baer383 · 05-25-2013, 05:36 PM

Coming back from Z days I was getting 23 mpg,I happen to notice when refilling.

roplusbee · 05-25-2013, 07:42 PM

Quote:

Originally Posted by Baer383

Coming back from Z days I was getting 23 mpg,I happen to notice when refilling.

I have been getting similar fuel economy while on my 1k mile trip. I have gotten 22, 20, and 21 MPG on the 3 tanks of 93 I used to get from Fontana, NC to Lawton, OK. Unfortunately, Lawton only sells 91 octane........ouch. my trip back to Killeen, TX should be interesting for the first tank of fuel.

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regulator11 · 05-27-2013, 10:58 PM

I just ran my first full tank of 93 (boosting heavily) and I got 18.7 mpg.

theDreamer · 05-28-2013, 07:46 AM

Quote:

Originally Posted by regulator11

I just ran my first full tank of 93 (boosting heavily) and I got 18.7 mpg.

Just wait until the day you fill up on Friday afternoon and then on Saturday, then see what your MPG is. I think I got it down to 9MPG.

04-27-2013, 02:14 AM	#63 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 26	Ethanol is a great big ripoff for consumers. It's government subsidized despite it being an inferior and less efficient fuel. It does have a higher effective octane, but when you go to the pump and buy gas cut with 10% ethanol, like in CA, you are basically buying watered down gas, which will impact your mileage. Infidel likes this. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)

04-27-2013, 02:30 AM	#64 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	Good point. No wonder during the 6 years of ownership with the 350Z at some point the car stopped feeling as peppy and a full tank didn't last as long. Around that time not all pumps were required to put the 10% ethanol notice. It's everywhere, and it's not really saving us much money. [END RANT] __________________

05-25-2013, 05:36 PM	#65 (permalink)
Baer383 A True Z Fanatic Join Date: Aug 2010 Location: Lawrenceville,Ga Posts: 4,293 Drives: My foot up your azz Rep Power: 30	Coming back from Z days I was getting 23 mpg,I happen to notice when refilling. __________________ 2013 ZL1 754 rwhp 747 rwtq

04-26-2013, 08:46 PM	#62 (permalink)
m3chhawk Track Member Join Date: Sep 2012 Location: Kansas City Posts: 878 Drives: '11 370Z SPT 6MT BLK Rep Power: 25	Ethanol has a much lower energy content than gasoline (~115k BTU/lb for gasoline vs ~70k BTU/lb for ethanol). So ethanol will always hurt your fuel economy. That being said, you can make more power on ethanol (~105-110 octane), but you need to at least tune for it and ideally build (higher compression) for it and you will likely flow 30% more fuel to make equal power.

05-27-2013, 10:58 PM	#67 (permalink)
regulator11 Base Member Join Date: Aug 2011 Location: Cape Coral Fl Posts: 34 Drives: 09 Nissan 370z BS M6 Rep Power: 14	I just ran my first full tank of 93 (boosting heavily) and I got 18.7 mpg.