Worse MPG with K&N drop ins?

Methodical4u · 07-29-2011, 12:51 PM

Quote:

Originally Posted by nvrbacardi

You had 26 MPG

When I put my K&N filters I went from 20 MPG to 22 MPG. IMO that 26 MPG is way high for a Z. I believe the number you are seeing right now is what you are supposed to have.

When I added the HPS tube it went up to 23.7 MPG

I averaged 25.6 on my second tank of gas and that was around town, highway, stop and go traffic, etc. It's very possible to get these cars to get good mileage. Add in some AMSoil SSO 0-30 and free flowing exhaust, intake, etc and 2 mpg should be the very minimum gains you see.

zcar_dad · 07-29-2011, 01:03 PM

I have had the K&Ns since I bought the car new. My mileage has remained consitent since after the break-in period. I now have 9950 miles on the car. For highway driving I get 25-27 mpg depending on what my average speed is (between 55- 75 miles per hour). Around town it gets around 20-23 depending on average speed. When driven to work it gets more as more highway miles versus city streets are involved. The above includes having high flow cats and using Royal Purple motor oil.

Methodical4u · 07-29-2011, 03:21 PM

Quote:

Originally Posted by zcar_dad

I have had the K&Ns since I bought the car new. My mileage has remained consitent since after the break-in period. I now have 9950 miles on the car. For highway driving I get 25-27 mpg depending on what my average speed is (between 55- 75 miles per hour). Around town it gets around 20-23 depending on average speed. When driven to work it gets more as more highway miles versus city streets are involved. The above includes having high flow cats and using Royal Purple motor oil.

Not to start any kind of oil war at all, but I would REALLY research that Royal Purple. It apparently breaks down really fast. Just some things i've read.

07-29-2011, 01:03 PM	#2 (permalink)
zcar_dad Base Member Join Date: May 2010 Location: Kansas City, MO Posts: 126 Drives: 2009 Nismo 370 #67 Rep Power: 17	I have had the K&Ns since I bought the car new. My mileage has remained consitent since after the break-in period. I now have 9950 miles on the car. For highway driving I get 25-27 mpg depending on what my average speed is (between 55- 75 miles per hour). Around town it gets around 20-23 depending on average speed. When driven to work it gets more as more highway miles versus city streets are involved. The above includes having high flow cats and using Royal Purple motor oil. __________________ 2009 Nismo 370Z #0067, Brillant Silver

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
What's worse than driving behind a Prius?	EazyD	The Lounge (Off Topic)	18	01-23-2011 03:28 AM
Worse stall?	LuckyJinx	Nissan 370Z General Discussions	18	10-01-2010 01:18 AM
Has VDC made you a worse Z driver?	nismolife	Nissan 370Z General Discussions	122	08-18-2010 12:12 AM
you know whats the worse....	tru_Asiatik	Nissan 370Z General Discussions	12	03-19-2010 08:27 AM
Dam%, can this week get any worse?	StLRedrider	The Lounge (Off Topic)	30	07-27-2009 10:32 PM