Worse MPG with K&N drop ins?

BuckeyeZ · 07-29-2011, 10:01 AM

I have installed K&N drop-ins on several vehicles and I have always seen a very small increase in my fuel mileage. Generally, I would get about 1-2MPG better.

wh1te370z · 07-29-2011, 10:23 AM

whats gas milage?

4r3s · 07-29-2011, 02:34 PM

On my trip down to SC from MD last year I got 28mpg. Traffic was pretty light on that trip so I was able to use cruise control for rather lengthy periods of time. I've never been able to repeat that, car was completely stock at the time.

Methodical4u · 07-30-2011, 01:05 AM

I'm still curious how people lose MPG when they get an intake set-up... is it because the ECU is making the car run more rich and the car needs to be tuned?

Maila87 · 07-31-2011, 06:30 AM

More air with same A/F ratio means more fuel in injectors. The car feels more agile in low RPM (around 1000 rpm). Will wait few hundred kilometers and we'll see.

FYI: Using original 18" wheels and stock tires.

Methodical4u · 07-31-2011, 02:05 PM

Quote:

Originally Posted by Maila87

More air with same A/F ratio means more fuel in injectors. The car feels more agile in low RPM (around 1000 rpm). Will wait few hundred kilometers and we'll see.

FYI: Using original 18" wheels and stock tires.

odd as one of K&N's claims is that they get more gas mileage.

07-29-2011, 10:01 AM	#1 (permalink)
BuckeyeZ Enthusiast Member Join Date: Dec 2010 Location: Music City Posts: 291 Drives: 370Z BMW M4 Rep Power: 66	I have installed K&N drop-ins on several vehicles and I have always seen a very small increase in my fuel mileage. Generally, I would get about 1-2MPG better. __________________ Stillen \| EVO-R \| HPS \| K&N \| Hotchkis \| Modshack Oil Cooler \| SPL

07-29-2011, 10:23 AM	#2 (permalink)
wh1te370z Track Member Join Date: Jul 2010 Location: New York, Long Island Posts: 559 Drives: PW Base Sport 6 Spd Rep Power: 17	whats gas milage? __________________ 1998 BMW 328is... Track Build 2010 White 370z.... sold

07-31-2011, 06:30 AM	#5 (permalink)
Maila87 Base Member Join Date: Apr 2011 Location: Prague Age: 37 Posts: 138 Drives: 370Z Rep Power: 15	More air with same A/F ratio means more fuel in injectors. The car feels more agile in low RPM (around 1000 rpm). Will wait few hundred kilometers and we'll see. FYI: Using original 18" wheels and stock tires. __________________ -->2005-6 Nissan Micra 1,3i CVT 72PS Red MY 98 -->2006-8 Nissan Almera 1,5i N16 96PS Red -->2007-8 Skoda Fabia Combi 1,2HTP 3 cylinder 60PS Green -->2008-11 AUDI TT 2,0TFSI FWD S-tronic 200PS Red MY06 -->2011 Nissan 370Z manual White Pearl

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07-29-2011, 02:34 PM	#3 (permalink)
4r3s A True Z Fanatic Join Date: Dec 2009 Location: MD Posts: 2,077 Drives: Touring 370z Rep Power: 25	On my trip down to SC from MD last year I got 28mpg. Traffic was pretty light on that trip so I was able to use cruise control for rather lengthy periods of time. I've never been able to repeat that, car was completely stock at the time.

07-30-2011, 01:05 AM	#4 (permalink)
Methodical4u A True Z Fanatic Join Date: Jun 2011 Location: Maryland Posts: 1,393 Drives: 11 370 6mt pw w/sp Rep Power: 17	I'm still curious how people lose MPG when they get an intake set-up... is it because the ECU is making the car run more rich and the car needs to be tuned?