Ok, so Im just curious.. as a new Nissan owner and all.
I have a 98 Maxima SE and I run Sunoco Premium 91 Octane in it.. usually wont refill till It's close to empty. How many miles total can you guys get on a full tank, my first fill up I also added a Fuel System Cleaner, and I got close to 300 miles on it. My second fill up since I had the car, and I have about 150 miles on it and It's near half a tank. Good MPG, or should I investigate into some more things.. I changed the PCV Valve, Fuel Filter, and dropped some NGK Laser Plat Premiums in it, I know my exhaust is in some bad shape, (Cat looks pretty rusted, the pipe the whole way back with the silver webbing on it is looking rusted, and the muffler wall is rusting apart) I wanna get the exhaust fixed around tax return time, also I get a 0705 Evap code on the engine after I opened it up on the highway on the way home from work.
Last edited by 1998MaxiMa : Aug 24th, 2007 at 08:24 PM.
There are a lot of variables when it comes to gas mileage, but I seem to be getting around the same as you are for city driving. And I've been haunted by an evap code for a while now too...
There are many variables.
Most I got from my Max's were...
96 SE, auto---660 miles on a tank. Went from Dallas to Galveston and back on one tank.
98 GLE, auto---565 miles on a tank. Same trip...almost made it without refueling.
99 SE, 5spd---575miles on a tank.
Now most of the time I was driving around the DFW area and I seemed to average anywhere from 380-420 miles on a tank, mixed driving (some spirited driving).
Yeah, I tried cleaning out the Evap Canister Control Valve.. that didn't help as I got the code a few days later while out on the highway.
Im driving slow N smooth on this tank to see what the car can actually give me.. I also added Seafoam into the crankcase and tank.. I then filled it up with Sheetz 92 Octane instead of Sunoco 91 (Both Are Same Price in PA)
I'll have to compare this tank with the results from here.. but I usually drive 10 miles to work and then back again. If I have to run errands I'll usually take my maxima, and the weather temperature has been around the 70-80s and Humid.
could a Knock Sensor affect MPG/Gas Consumption.. I heard its a "phantom" code so Im assuming it won't blast a CEL at me, instead I need to pick it up off a OBDII
Yes, the knock sensor code is a "phantom" code. It will show up on an OBDII scan, but will not trigger a check engine light. When my knock sensor was bad, under half to full throttle, the car would seem weak when it's under 3000 rpms, but would get better when over 3000 rpms. If you need to replace it, there are a lot of write-ups on how to do it without removing the upper intake manifold like it says on many repair manuals. Just have to search for it, and it helps to have small hands...
I have a 98 Maxima SE, with about a 14 gallon tank, and before i started fixing all its problems i was getting about 300-400 miles out of a tank of gas. After buying a cold air intake, replacing the old knock sensor, mass air flow sensor, Intake Air Temp. Sensor, fuel filter and fuel lines, and replacing the fuel injectors, I began to get about 600 miles out of a tank of gas, and if i dont drive to crazy i have seen close to 650
Linear Mode
