Gas mileage on trips, lets compare?

[unlimited]

I have a quick question and maybe we can compare estimates? I just got back from driving all the way from Texas City to Dallas, TX in my J30 front and back (don't ask lol X] ) and it took one full tank to get there and another to get back on premium gas (from F to E exactly!) and I was wondering was that normal? my mom kept saying, "why is this car drinking so much gas??" but Texas City from Dallas is quite far, 276 miles. so i was wondering do you guys or gals think that is normal? i was doing about 80-85 the whole way until i slowed to 40 because Dallas highways were frozen over. J30 started hydroplaning under the overpasses too :S

[driverdriver]

The car is rated for 21/22 mpg on premium gasoline. You'll get less if you run it on regular (never mind clogging up the injectors).

[yodawill2000]

Sounds kinda low to me ..Replace the Air filter lately ??Also picking up a bottle of Redline SL1 from Pep boys and Adding it to a 3/4 to full tank will do wonders !!It did to mine anyways.

[Jakw]

Despite its lower rating, I've gotten a high of around 27 mpg, and I used to average 23-24 when I lived in CO.

[yodawill2000]

Where are ya now Jakw ??Not in Greeley anymore ?

[Jakw]

Oh I never changed that here, huh? I'm in Sheboygan, WI. Yup, I drive the J through WI snow. Btw, my name is Jake, and Jakw has been a typo this entire time.

[InfinitiAndre]

Don't feel so bad, I only get 250 miles at MOST on a F to E tank.

I can't understand myself why the J costs so much money in gas! I drive normally, have an aftermarket intake for better air circulation and pump premium fuel always.

[unlimited]

Don't feel so bad, I only get 250 miles at MOST on a F to E tank.

I can't understand myself why the J costs so much money in gas! I drive normally, have an aftermarket intake for better air circulation and pump premium fuel always.

unfortunately i cant say the same :S. driving on the highway today i can see its alittle of me, entering tollways i always floor it but at the same time i agree, i think it should be doing alittle better that what i'm getting. have you tried anything?

[unlimited]

Sounds kinda low to me ..Replace the Air filter lately ??Also picking up a bottle of Redline SL1 from Pep boys and Adding it to a 3/4 to full tank will do wonders !!It did to mine anyways.

yeah! i plan on doing the redline thing, i think that will help alot and my mom agreed with you on the air filter thing, gonna check that out also.thanks for the advice!

[GerryO]

F to almost E miles per tank varies from about 230 to 320 for me, depending on the type of driving, how much time is spent sitting a red lights and rarely exceeding 3K rpms, but those occasional 6K+ rpm pulls sound so nice!

A fill-up is usually 12-14 gal, and around town I'm lucky if I get 25 miles on that first 1/4 of a tank, versus about 50 on the highway.

New O2 sensors improved highway mileage and the tank is supposed to hold 19 gallons, but I've never tested its' listed capacity.

[J30inthe sun]

Last Christmas I drove from Ft Lauderdale to Tampa, 265 miles. I filled up the next day & calulated my mileage based on my trip odometer & gallons to fill back up full, going @ 70-75 mph the whole trip & it was @26 mpg. In 2003 I drove from Marathon FL to Tampa one a full tank, F to E with low fuel light on at the end, @380 mile but that was going on average 90 - 100 mph.

[unlimited]

Last Christmas I drove from Ft Lauderdale to Tampa, 265 miles. I filled up the next day & calulated my mileage based on my trip odometer & gallons to fill back up full, going @ 70-75 mph the whole trip & it was @26 mpg. In 2003 I drove from Marathon FL to Tampa one a full tank, F to E with low fuel light on at the end, @380 mile but that was going on average 90 - 100 mph.

damn man, 100??? lol I was pretty nervous doing my 80-85 heading from Texas City to Dallas but after awhile other cars followed suit and we were all averaging 85 X]. Cant go down alone... gotta have someone else matching my speed ;]

90-100 would've had me nervous o.o do you get a lot of wind noise and vibration going that speed? I seem to get a lot, at least with wind...

[yodawill2000]

if you get vibration up at those speeds you have something wrong !!!When I got my set of V rated tires awhile back it was smooth as silk up to about 120.Sounds like you have a tire or two outta balance.

[J30inthe sun]

damn man, 100??? lol I was pretty nervous doing my 80-85 heading from Texas City to Dallas but after awhile other cars followed suit and we were all averaging 85 X]. Cant go down alone... gotta have someone else matching my speed ;]

90-100 would've had me nervous o.o do you get a lot of wind noise and vibration going that speed? I seem to get a lot, at least with wind...

BTW @26 mpg is with 4 new Goodyear Eagle ResponsEdge tires (215/60/15) with about 1,500 miles on them set at 29 psi cold. This is the 4th set of tires I have had for this car & I must says i like these the best so far.

At 80 and above the wind noise becomes noticable. This last trip I am noticing a vibration that starts at @65 - 75 mph. I just had a new rack & pinion unit installed yesterday with new outer tie rod ends & rack mount bushings (@$840 including labor). They checked the ball joints (I think that's where the vibration is coming from) & the are shot, so on Monday I am doing new lower control arms (uhm... I think that makes every component in the front suspension brand new over the last 5 months).

I am at @115,000 miles now on my J30.

Several years ago I remember going @ 110-115 & everything was silky smooth.

[unlimited]

if you get vibration up at those speeds you have something wrong !!!When I got my set of V rated tires awhile back it was smooth as silk up to about 120.Sounds like you have a tire or two outta balance.

yep, when i first purchased the car it was really bad, it would start at around 50mph, and a lot of people from tire shops said we needed new tires because they were old and all different sizes and to have them balanced. we got two new tires and it helped a loooot. i mean the vibration is only noticeable at around 60+ but its faint, though i can feel it shouldnt be there. my moms pushing me to get 4 new michelin tires but everytime i go to a tire shop and ask about them i get an answer that "they're overrated" so not sure...

man where were you going 120???

[unlimited]

BTW @26 mpg is with 4 new Goodyear Eagle ResponsEdge tires (215/60/15) with about 1,500 miles on them set at 29 psi cold. This is the 4th set of tires I have had for this car & I must says i like these the best so far.

At 80 and above the wind noise becomes noticable. This last trip I am noticing a vibration that starts at @65 - 75 mph. I just had a new rack & pinion unit installed yesterday with new outer tie rod ends & rack mount bushings (@$840 including labor). They checked the ball joints (I think that's where the vibration is coming from) & the are shot, so on Monday I am doing new lower control arms (uhm... I think that makes every component in the front suspension brand new over the last 5 months).

I am at @115,000 miles now on my J30.

Several years ago I remember going @ 110-115 & everything was silky smooth.

i need weather stripping around my doors :S not sure if that is a do-it-yourself job or should i take it to Infiniti up the street.