More dogma.

Mileage measurement advice is spot on tho.

 

After looking at the specified MPG of the 03 Sedan (19city/24hwy), that seems a little optimistic unless you really drive conservatively.
IIRC the city mpg is more around 15-18 with average driving, and around 22-24hwy. I believe I get around 23/24hwy with my 6speed coupe when I drive conservatively (calculated using the NAV Fuel Economy feature).


As someone stated, you would have to calculate your MPG's differently

 

any update ? im curious since im getting 30mpg at 65mph on what can tank a G thats alost the same year as mine...

I did get a tune and a plenum kit .. 2006 5at

 

Ha! Where do you live? Kansas?

 

Most likely they use no ethanol gas to get those numbers. If you can get access to no ethanol gas you should be able to get better mpg. By the way coupe is heavier than sedan.

 

Oregon.. 10% eth is mandatory. last trip made 395 miles on 13 gallons. coast roads are heavily patrolled so 65 was the max speed before getting a ticket.

late 04 05 and 06 sedans can crack 28+ easy .. just check the forums. heck come on over and well take a trip to some of my fav portland gentlmans clubs

 

one note im not in a "sport" so i have the 3.3 rear diff and not the 3.5 some other G's have

 

But, I mean is it extremely flat where you live? I can get 30mpg on my nav (or more if I'm hypermiling) on the super flat trip to Vegas, but here in SoCal its very hilly.I can't get over 24.2 on my navnav (and that's hypermiling. My norm is about 23 if I drive it like a manimal).

Same thing with the ford ranger I had back in the day. Got about 25-26 in SoCal, but got 35 on a trip to Vegas going 85-90 the whole way. Hills are mpg killers.

 

its flat as paper on i5.. coast has equal hills and valleys. 28 mpg is pretty cake when you set the cruise right at 65. more than that is possible but it took the toon to fix the g35 oem afr to get a better mix.

at 65 im at 2700rpm for frame of reference.

going more than 70 EXPONENTIALLY kills your mpg.

 

I know I can still get above 25mph Hwy if I drive super conservative even with Ethanol added fuel.

On some days when I'm bored and have nothing to do, I go for long drives since I live close to the beach (about 30 miles) and use the Fuel Economy feature on the Nav. If I drive say 50mph in 6th gear on a long highway with no traffic, I can easily hit 28/29mpg. That is about the same as my 2003 Camry's hwy mpg and it has a 2.4L auto.

 

Would have to agree here. There are other methods to ensure proper tire contact to the roadway than just simply inflating to max pressure on the sidewall. Not to mention overinflated tires can affect handling and braking performance, as well as acceleration. One of the easiest ways to do a burnout is to overinflate the tires because the center of the tire tends to bulge. The uneven pressure of contact the tire has with the road made it very easy to light up the tires.

If you want to hypermile, go for it. But the sacrifice in ride quality, handling and acceleration/braking is not worth it to me. If i cared about fuel economy, i'd buy a Prius.

32PSI works for me on my vehicle, and I got 75K miles out of my Continental's before replacing them.

 

I filled up a full tank today and will keep a tab on my mileage and get back to you guys with the results. Also I was using my scan tool and looking at all the sensors and I noticed that my bank 1 sensor 2 O2 sensor was reading at a constant 1.275v? No change what so ever with the readings unlike the other 3 O2 sensors? Could this be what's causing the problems? Also it's almost brand new and has not triggered a cel, but what would be the cause of it?

 

Radial tires do not bulge in the center from over inflation. That's an old wives tale that stems from days of bias ply tires. Not to mention that the manufacturer of the tire puts that max psi as a max psi while still working perfectly normal. It doesn't say "max load: 50psi, unless you want it to work properly in which case inflate it 18psi less than we have deemed safe".

Inflating to sidewall is perfectly safe and your tires will work just as well. Scouts honor. Give it a try. You'll be pleasantly surprised.

 

So disregard the O2 sensor question, it just takes another few minutes to heat up compared to the other bank. Also when I start my car and drive off I have had the car stumble maybe 3-4x in the last couple weeks. Just once per drive when it happens and it only happens for a quarter of a second or so but it is noticeable, and right at the beginning of diving (first 100m or so). im going to inflate my tires to 40 and see what it does, hopefully it'll give me better mpg's . Also I was just curious what the timing should be on the g? I am going on a road trip tomorrow and would like to keep an eye on it with my scanner to make sure that it is not a factor in my gas issues?

 

I have tried. I've spent countless hours painting stripes across my tires and inspecting them for wear during autoX or drag race sessions.

Not repeating internet lore here...i'm speaking from personal experience spent on a track.


In my experience, tire pressure, with relation to weight and size of the contact patch, does change how the tire contacts the roads surface.