From what I understand any mod that makes your car more efficient will give you better mpg as long as you arent stepping on it. I am curious what mods would give me better mpg on long trips where I would be crusing and not mashing the gas. I only have a HAI right now and will have a y-pipe after I install it this weekend. I was thinking of getting a catback in the near future and eventually an 00vi as well as an VAFC. Would these help out my mpg? Also I was planning on putting a drop on the car too, would this give me a slight increase as well? I would like to see 30+ mpg on the highway and am not sure if that is a reasonable expectation. I have read a number of low mpg threads but it seems that a lot of people there get on the gas pretty well. I am just more curious for long trips since I know I get on it when I am in town

 

opening up the exhaust will help the engine breathe better, which should help MPG a bit.

Your HAI is probably hurting your mileage, and the hot air intakes don't help the engine breathe any better. Hot air intake probably hurts power output and mileage. Hotter air simply means less power and mileage. Put the stock intake back on for best mileage and power.

Variable intake won't do anything for your mileage. It only comes into effect over 5000rpms.

 

Do a good tune up, this will definately help MPG. Most performance mods do just that help you in the HP/TQ department. In most cases HP and TQ equal RPM which equal more gas consumption. Like I mentioned at the top plugs,tire pressure, oil changed, fuel filter, air filter, all of these will help get that MPG up. NOTE: Nissan designs these cars to get the maximum MPG out of the factory, without killing all the HP. Minus the y-pipe.

 

A lot of MPG is lost at the tires. A quality touring tire would probably give the best mileage over snow tires or tires with a rough tread pattern. The max also uses really wide tires. You might notice that cars designed for fuel economy use narrow tires, this isn't enitrely because those cars are its also because wide tires have much more grip and thus more friction that the engine has to overcome.

 

Increase the tire pressure to say 35 psi, rather than 32 or less. This will help fuel economy and increase tread life, at the expense of a slightly stiffer ride which you would hardly even notice on the highway.

Perhaps a bottle of Chevron Techron, Gumout Regane, BG44K or using LubeControl FP60 would help clean out the fuel system and improve MPG.

 

I'm hoping to see better fuel economy on the highway with my new Y-pipe. In theory, I should get better mileage

 

I installed this block under my gas pedal. it basically stops the pedal from going farther than 1/2 way down. this mod has effectively raised my gas milage per tank and MPG.

 

that may not be such a great idea, you may need to floor it to get out of a close situation...

 

I dunno it might be just me but I think my cone filter is saving me more gas than it is using. Oh yeah if you have high miles and haven't changed your O2 sensors and you are THAT worried about mileage, change them you might see a bit of an increase.

 

Fuel is used up three ways:
1. Accelerating the mass of the car and its passengers to the cruising speed. This is entirely dependent on weight, so any weight you can remove from the car will reduce energy spent on this. And this factor is the main reason behind poor city mpg.
2. Cruising, there are two factors:
a) the effective frontal area of the car (aerodynamic drag). This depends almost entirely on the car's basic shape, not a lot you can do, but lowering and a front air dam will help.
b) the rolling resistance of the tyres. The only ways you can change that are to fill them with nitrogen and to increase the pressure, someone suggested 35 psi., I use 33 psi with no problems.
3. Internal frictional losses in the powertrain.
Use Mobil-1 rather than an oil with a higher viscosity. Thicker engine oil increases losses. Driving round with torn CV boots and dirt inside won't help either.
And like others already noted, a new air filter, clean the IACV and throttle body if they haven't been done recently. And above everything else, use decent gasoline not low-octane stuff.

 

LOLz

 

I thought I remember seeing that the under-hood temperature is almost exactly the same as the ambient air temp when cruising at 50mph+

 

Wouldn't this increase tire wear since if you over inflate it, it would eat up the middle part of the tire more.

 

tornado intake adaptor and electronic supercharger.

 

To improve fuel economy several things should be done. Limit highway speeds to around 60-65mph, keep your tires properly inflated, reduce the useage of AC, avoid excessive changes in speed. Also avoid excessive idling of the engine like in the morning to "warm it up".

 

Ok so I have 32 psi in the front and 29 psi in the rear which is manufacterer recommended. Can I effectively raise all 4 tires to 33psi and get better gas mileage? I notice that when I use 93 octane it burns slower than the b.s lower grade 89.

 

drive normally, dont go past 2500rpm, lol, this will save the most gas and no mod will come close to it. But i'm guessing that since u r putting performance mods on you are not really interested in driving slow.

 

I wonder as well, if lowering the car would make for less rollng resistence. I know it will handle better!

Highway driving, with the windows up and A/C on will yield more MPG than having the A/C off and windows down...I've tried it many times, checking mileage on road trips, and it seems to hold true. Less turbulence and resistence when the windows are up.

 

i notice after i installed the cattman ypipe, my mileage went from 350 per tank to about 415 a tank. not impressive but it did help. no hai or cat-back yet just ypipe.

 

Don't mod for gas mileage, it's pointless.



That said, Fidanza, Y-pipe, SAFC-II or similiar (mainly just the fidanza and y-pipe though)

 

Wow 350 a tank, no way. I was getting 275 before my tune up and then 2 weeks ago i did a tune up, now im doing 300, in the entire life of this car i've never seen 350. I have 35psi all around, new O2 sensors, new oil, new brakes, good tires, a clean air filter, and i drive stick, i dont believe ur getting 415, try calculating it better, that means ur getting almost 25 mpg.

 

I believe it. When I drove from NY to FL, it was exactly 1186 miles. I used 2 1/2 tanks getting down. I got approx. 450 MPG driving all the was down I-95 using cruise control doing mostly 75 MPH. And don't tell me theres no way because the miles don't lie and yes I did calculate it correctly.

 

I constantly get in excess of 500 miles/tank on road trips, and have hit 550-553 miles, albeit on fumes, 3 times.

 

HOLLY ****! I recently changed my knock sensor and my milage went up from ~250mi/tank to ~320mi/tank.....but over 500mi/tank? What u have in it a civic engine?

 

i have no comment

 

i dont know if this will help you decide or not. i use to get 26 28 mpg hwy stock.. after i put cai and custom exhaust on i started getting 20 to 22 mpg hwy... my custom exhaust was really bad.. so i bought a greddy sp2 system.. after testing few trips alabama to tennessee and tennessee to alabama. i got 32 mpg. yes i hit 560 and still had about half a gallon left

 

Dont think putting a block is the answer like someone have already day IF u need extra power do you actualy remove the block before ?

I've done 500 going to a 200 miled trip. Dont think any of the recommended stuff i've been done to this car. I have bought her a few month ago going to do all of this stuff in the summer. hope to get better mileage cause im doing almost 250 miles/week just to get to work.

btw,didnt see someone talking about spark plug must help

 

All the stuff that applies to other cars also applies to our cars. Tires, proper state of tune, driving style. I'll add cruise control to that too.
Oh, and BTW, I get 375 to 400 miles on a tank in COMBINED city AND highway driving, and I DON'T drive 55....

 

Who does these days?

In Atlanta going 55 on the HWY will cause an accident.

 

i do lots of city driving too with lots of high speed sprints. another thing is u get better mileage with premium vs regular unleaded. i tried regular for awhile and engine was very sluggish.

 

Another thing that Ive noticed that will increase your gas mileage by a lot is properly aligned tires. When I had my old tires i was getting horrible gas mileage becasuse the drivers side tire was turned slightly left while the passenger side was turned slightly right, i could feel the tires fighting the car while crusing.

 

Light wheels!

 

Has anyone tried those things that sit in the intake and spin the air, those turbonator things? Im debating getting a CAI and putting the turbonator in it to really pump up power and MPG.

 

NO! Read the stickies!!!!

 

Yea hes right I get about 350 375 tank on premo I just have cone filter with home made induction lowered guted cat with cat back no y pipe {yet} oh yea and a quarter of a mill on the miles lol

 

I think this might help and it is cheep concidering it uses co2
http://www.customenterprise.com/view.../vts/design017
I think that this is better than nitrous it doesnt have the down side to as much internal wear and tear plus its alot cheeper!!!!