22/27 (22 is only short city trips, 25 is typical mixed driving, 29 was best ever)

1997 GLE Auto, stock wheels, K&N drop-in, 180k+ miles

Have always used 93 octane and Mobil1 10W30 full synthetic. Had a KS code for a year+ which didn't affect it, and run injector cleaner 1x/yr which seems to help.

 

22.5 in my 5.5 right before i put it into a wall. my 2000 gets the same tho weird huh? both autos.

 

smfh..today i averaged 10mpg
96 AT,143xxx
i dont get it..

 

My car gets 18 MPG around town...
96 AT 185K miles

 

I'm hoping to see a number that high on mine, soon, and with how reliable it's been up to 218K, I think it's very possible!

I run premium (93), too...the manual calls for 91+ but says lower octane fuel can be used if nothing else is available. I don't notice a difference in responsiveness or fuel economy between the two, but the only CEL (EGR Flow) I've had came on a few hundred miles after I filled it with 87 and went off after a couple tanks of 93. Probably unrelated (I think), but with that many miles, I might as well baby it.

 

5 speed 202,xxx miles
13-15 mpg city (all cold starts less than 5 mile individual trips and hard accelerations on 93 octane), about 22-24 highway.

 

How hard is the Knock Sensor to change and can it be tested beforehand?

My 03 auto (97K) is getting about 25MPG on the trip computer which is about 4MPG high so about 21 combined. Cleaning the MAF sensor gained me 1-2MPG!

 

I'm beating my Maxima until something breaks, so like 10. My project daily-driver rabbit is almost done, when it is, the max is being parted out

 

Did you get a CEL? Because I'm getting about 12-15 mpg right now. I'm going to clean my maf and throttle body, and change spark plugs. But, I was thinking maybe the o2 sensors may also need to be changed. I have a 98 maxima with 200K miles on it, just bought it about a month ago.

 

I used to average between 28 and 29, best of 31. 95 SE, Stock, 215k, MT, 50/50 highway/city. "Hyper-mile" techniques sometimes (upshifts to 5th asap, coasting, drafting, etc) but matting it plenty of others... 89 fuel & crap oil. No idea wtf you guys are talking about with all the letters (CEL? KS? ICV? TV? IAC?!?) so I definitely never cleaned or replaced any of that ****.

I get 26-27 now in my stock 99 I30 (79k). Cant do that hypermiler **** with the AT. (computer shifts, no coasting etc) Premium fuel, Mobil 1

 

was always curious to see what my real gas mileage was so i tested it last weekend:

96 5sp w/ 151K miles. just washed, ram air intake, headers + full exhaust, sawblades, CEL for evap leak. clean tb and iacv, dirty egr.
full tank 93 octane

mostly highway driving with some 60-100 pulls, cruising speed 70mph with rpms a hair under 3k. back road cruising rpms were around 2K. shifting at 3500 to 4000rpms between all gears. I also always downshift when slowing down.

435 miles driven / 16.114 gallons consumed = 26.99MPG.

hoping that cleaning my egr thats never been cleaned will net me 1 or 2 more mpg.