I avg 230-250 a tank 13 gallons 93 octane $40

now that 93 is $3.05 a gallon I put 89 octane 13 gallons $40 and I think Im getting better gas mileage. Make sense?

 

whoversays they get more than 300 mpg city driving is straight lying. Gimme a break

 

So you're purposely destroying your car?

You do know a Maxima was dynoed using 89 and 93 and there was a 14WHP and 20WTQ loss right?

 

Yes I use to filled up my car with 91 octane, now I use the 89 instead and be a little gentle on the gas pedal off the stop sign.

 

using 89 instead of 93 will only save you about $3 or 3.50 per tank, so why is everyone right away switching to 89 when gas prices rise?

 

Because it'll save you $3.00 to $3.50 a tank...?

 

With noticeable performance loss with 89, id rather spend a little more on 93 and enjoy the car. I think $3 is worth it for me.

 

I may have to agree here...

 

93 octane?

doesn't the booklet say that we should use 89-91 octane? or well, that's what the service center at County Line Nissan said

 

 

I get close to 300miles per tank running 94 octane 60/40 city/hwy. I'll have to baby the thing (never shift above 3000rpm - except on highways). It just so tempting to redline the car at every stoplight!

 

No lies...I have a 2k auto-tragic with 126K miles. When I'm on all city driving I get 320 until I hit the low fuel light. That's about 20 to 21 MPG. In the city and highway driving mix I get close to 400, usually 380 to 390 (24 MPG).

It really pays off to keep with the maintenance and your driving habits. I have lightweight wheels (<17 pounds) which probably helps as well.

PS: One of the original reasons I bought the Max was due to the higher range capability. I remember the commercials that stated 500 miles between fill-ups. I knew it was BS for 500 miles, but if I could get 400 miles that would be cool.

 

somethings wring with your car if you cant get atleast 300 mpt. are your flooring the car? or racing?? get your car checked, you should be able to get 340mpt with mixed driving.

 

wow, i'm just setting at 300mi with exactly a 1/4 tank. i always get 200 mi out of a half tank with 50/50 driving. no real stop and go stuff. mine's a 5 speed and i use 91-93. 22-23 mpg

 

Ok my SE 3.5 Max sounds like messed up!!! lol Well anyway my mpg shows 22+ most of the time. Well I fill the tank all the way up to 17.5 gallons and drive. At the end, I end up at 300 miles and need to fill up agian. I don't know what's wrong, the mpg shows 22, so basically I need to be reaching up to 370 miles with 17.5 gas of tank.

Anyone got the same problem going on? Hmmm....

 

Shurik,

I found the same issue with my '02 6 spd, 85 k. Basically the MPG gauge would read around 30-31 MPG (I drive all hwy) but I really was getting 26-27 MPG when I did the math (gal at fill up/ miles driven since last fill up). Then it dawned on me that the car probably only calculates the MPG when you are moving. It was winter here in MA and I let the car warm up for a few minutes every morning before I left for work- hence the discrepancy.

We'll see if I am correct now that the weather is getting warmer and I won't warm the car up as much. Today it actually said 37.6 MPG when I pulled into work...

 

try seafoam, and do a tuneup, check your tire pressure. that should help your milage a bit.

 

70% highway (~70mph) always gets me 400+/tank.

 

yeah some of you are getting real poor gas mileage. i feel like cruise control makes me lose gas mileage b/c it's so jerky, like pushing and releasing of the gas.

 

Trip computer is CONSISTENTLY optimistic with its mileage calculations. City or highway, it doesn't matter although I think it's even further off in the city. It's 3-4 MPG optimistic on the highway and 5-6 MPG optimistic in the city.

For the record, I have gotten 820km (510 miles) on a tank once with 100% highway. Typically I get about 650km highway and 500km city.

 

The best way to check your gas mileage is reset your trip tick to ZERO after you fill-up your tank. Next time you get gas check the mileage on the trip tick and compare with the gallons of gas used on the fill-up.

 

Wow I break 300 on the usual. Usually its 50/50 highway and street and I get close to 340 to a tank. 00 Maxima with 75000 miles, Royal Purple Oil, and Bosch Plat Sparkies

 

I realized something else last night. The MPG gauge on our cars does not use the full capacity of the tank to calculate the range. I had a reading of 34.4 MPG and a range of 444; that would only mean 12.9 gal! I would find it hard to believe that the car has almost a 5 gal reserve.

Does anyone know how the computer actually calculates the MPG and range?

(I agree that the only real way to know is to DIY when filling up. I just want to understand the craziness of the computer).