He means on the highway.

 

And I was driving 75 the whole time plus my car is modded. So don't let people tell you that mods decrease mileage.

 

Finished up with 355 miles

 

did I tell you in that other thread ..... Do some

 

I have broken 500 miles on a tank at least 15 times and 550 miles 3 times (5-speed, not using AC, cruise control at no more than 75mph).

 

well personaly i get about 20 miles per gallon city.. iv only filled up the car 2 or 3 times since i got it.. i hardly drive highway

 

I find that very hard to believe being that it's really hard to get over 500 miles (traveling on flat roads) to the tank especially when driving at 75. The 5 speed is revving higher, than the auto and using more gas.

If your travelling mountainous road, then their is definitely no way you can break 500 (you means anyone that tries it).

If you say you did it, then I can't prove you wrong. I just don't believe it.

 

So what is the terrain in Franklin, Mass? At what engine speed do you decide to shift?

 

It doesn't matter because this happened on my PA to IL leg of my trip to Maxus in Dallas. I did say earlier that this was done on my trip to Maxus.

 

I drive 120miles /day usually around 70-75mph just to get back and forth to work in my Max. Ive been keeping track of gas mileage lately as prices have gone higher and higher. Ive found that with "Super Unleaded" filled to the point the pump will not allow any more fuel to be put in I can go about 420 miles. From that point it usually only takes about 16.2 gallons to fill it back up to max again. With "Regular Unleaded" I usually get to about 380miles. yeah yeah...i know... dont use regular....

 

Wow, some of you are getting pretty good mileage.
I'm pretty consistent at filling up ~16 gallons every 320 miles, though I do a lot of city/stop and go driving.

 

I have no reason to lie about this. Remember when driving mountainous roads, there is also a lot of descending and there are plateaus at elevation where you are running on relatively flat terrain at elevation for extended periods.


Maybe it's got something to do with running Canadian gas. I suspect that if I was driving on the prairies and wind wasn't a factor that I could get even better mileage. And I still have the OEM original plugs in the car at 59,786 miles.

I'm also running the OEM Goodyear Eagle RSA 215-60R-15 tires and the 15" sawblades. So many .orgers are running 18" or 19"s and 235 plus tires, so no wonder their fuel economy suffers.

I also wonder if the road surface has anything to do with it. Our highways in Canada are asphalt, not that noisy crap you use in much of the US.

When I switch to synthetic oil in 3,000 miles I anticipate even better fuel economy.

My straight city driving is nothing to write home about - say 350 miles to a tank when down to fumes.

 

I have broke 500 miles on a tank twice so far, running around 75 mph with cruise and AC running. With city driving I get between 320 (slightly below a quarter tank left) and 380.

 

I just made a trip from Eugene, Oregon to Lake City, Washington and back and got almost 300 miles from a hair over half a tank, usually with the highway city mix to work and back i get about 100 miles per quarter tank, I always fill up at a quarter tank.

 

I know the bottom half of the gas guage drops a lot quicker than the top half, but I suspect you could have made 500 miles or better on a longer trip if you had taken the tank right down to fumes.

 

The only time I got 500 miles to a tank was when I had my Maxima onboard the Amtrak AutoTrain....

 

How much heavier is your Infiniti than a 4th Gen Maxima? I suspect you drive with the AC on a lot as well.

 

Driving my 98 100 mi a day round trip on highway I can go about 400 - 450 depending on A/C usage... My 98 has 192k, stock everything else, 93 octane and synthetic oil...

 

I added KN filter, changed fuel filter, spark plugs with ngk platinum, pcv valve which was plugged like crazy, and my mileage didnt seem to improve at all. about 24 on highway, 20 in city/some highway. I do get a knock sensor code but bypassed it with a 470k resistor so that should get my timing right with prem 91 grade. In fact after the changes I got 19, worse than I had before. I also cleaned the TB, so what could I be missing here to get the mileage up? I think I have done everything I read to do including adding injector cleaner, and still no luck. (The prev owner had been using regular but I am on the 6 or 7th tank of prem but dont think that should matter by now?)

 

my statistics book says that maximas get 28 miles in street not highway


i dont belive my book

 

official epa ratings are 21 city and 28 hwy I believe, 23 combined, but I've seen several claim to get 30 or more on highway.

 

Well, I FINALLY took my car on the highway for a trip longer than 30 miles. Up until now, I had no idea what kind of mileage I could get on the highway. After going 158 miles at 80 and with the AC set on "Antartica," the car registered a little less than 27 mpg.

I can lived with that....

 

That is not enough miles on a tank of gas to get an accurate reading.

 

on a long trip Ive seen 350-400 but with my heavy right foot around town I get 250-325 or so.

 

That is pretty pathetic gas mileage. There must be something wrong with your car. I routinely get 350 plus around town and 500 plus on the highway.

 

Ok so normally I get 300-330. This last fill up I watched myself and didn't floor it at all for the first 1/2 tank and cleared 250 miles. Then I got sloppy, the last half only lasted until 300. Thats right 1/2 tank for 50 miles. I do drive 50 round trip in stop and go traffic.

 

How fast do you go on the highway? My average highway trip is 350 miles and I use 3/4 tank. My average speed is over 90mph with peaks over 105. It seems like you drive really slow if your getting 500 miles.

 

Nobody in British Columbia drives as fast as you and expects to retain their driver's licence. There are some highways in the Interior of the province where you could drive as fast as you for spells, but if you didn't know where radar was you would be sure to get nailed during the course of a 350 mile trip.

I drive 110 kmh in a 100 zone and 120 kmh in a 110 zone. Anything above that would not be tolerated by the RCMP. So I cruise at 70 or 75 mph depending on the speed limit and occasionally air it out for awhile, but pick my spots carefully.

Slow down and enjoy the scenery.

 

did you push the car to get to gas station or what. thank is rated at 17.5 gall.

 

It is rated at 18.5 and I put in 17.77 the one and only time I ran out.

 

just wondering if the hacked airbox improves gas milage? i heard that somewhere...

 

Not appreciably.

I'm still getting 32mpg @ 75mph even after the 5spd swap. Last week, I filled up after a 450 mile trip and the car took 14 gallons.

 

I drive through central california as many as 8-10 times a year. There is no scenery.

 

I must admit that about 12 years ago, I drove back to BC from Las Vegas over the Mojave via Bakersfield and on up. I said to hell with it after being passed like I was standing still my every man and his dog, so I went with the flow at about 90 mph. I didn't see anything that resembled a police car.

And you're right, the scenery can be pretty bleak. It reminds me of Las Vegas to Reno - cactus, sage brush and jack rabbits at night, lol!

I wouldn't try that in Oregon or Washington, however.

 

is that mpg or kmpg?? 300-350 is around 29mpg which is pretty damn good.

 

It's miles. I have exceeded 550 miles on a tank of gas three times at least.

350 miles to a tank is less than 20 miles to a US gallon. The EPA estimate for highway is 27 for a 5-speed and 28 for an automatic, which I can better with my 5-speed.

 

i hate you ppl with them 400+ miles per tank.

I struggle to get to 350. i'm right near 20mpg. 40% highway 60% city. But highway stand stills are killing me. I've done nothing in regaurds of tune up yet. So i'll see after i get all my stuff done if i can break 400

 

last week drove from chicago - wisconsin dells - chicago. Total 400miles and my car ate all gas in my tank. but i was speeding 115+

 

all of u who get 300-400 miles a tank....damn u people drive slow......grannies !!haha.....

 

Yeah this board does nothing but get me peeved. I have a had a knock sensor code for a while, though. I had Nissan look at it recently and they told me it's expensive to get replaced. I guess I'll stay with my 21 - 22 mpg city/hwy a little longer till I get ready to get this thing replaced.