89 240sx gas milage

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
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alms24sebring
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Joined: Wed Nov 15, 2006 12:18 am
Car: '97 Nissan 240sx. First Nissan. First love. Sold.
'04 Nissan Sentra SER SpecV
Location: Alexandria VA

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This is why I bought a single cam 35 mpg civic :gapteeth:


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float_6969
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Joined: Mon Aug 26, 2002 1:55 pm
Car: CA18DET swapped 1995 Nissan 240sx (too many mods to list)
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I too own a single cam 35mpg civic! It epitomizes "beater". Old, rusty, banged up, ALWAYS starts, RARELY brakes down (only on my wife apparently), when it does brake down, it's easy to fix (new battery, new alternator, new ignition coil), and gets good gas mileage!

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95zenki man
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Joined: Mon Sep 13, 2010 11:38 am

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Play with the 2 nuts on the cable.

The butterfly flaper things are pointlis and stupid. First thing i did before putting my motor in was take them out. Cant say how much difference it has mad but it feels a little more snappy of the line then others i have driven with pretty much the same setup.

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1989240sx
Posts: 247
Joined: Sun Nov 26, 2006 12:28 pm
Car: 1989 240sx and 1974 duster

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yeah i was looking at get honda crx but i dont have the money for it right now. i am just trying to get the most out of this car right now that is all. seem to do good on the freeway but i am rarely on the freeway

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1989240sx
Posts: 247
Joined: Sun Nov 26, 2006 12:28 pm
Car: 1989 240sx and 1974 duster

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i was wondering if upgrading the exhuast system on my car would be worth the money overall ? and was wondering if it would increase gas milage at all ?

mechanicalmoron
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Joined: Fri Apr 29, 2011 1:04 am

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johntom240 wrote:header,full 2inch exhaust no cat or hi-flow, straight thru muffler, 2.75"cold aire intake( make yourslef a box around the filter and utilize the stock airbox fresh air tube for best result) clutch fan delete get sum altima electric fans, light weight flwhyeel,aluminum driveshaft and get 4 lug aluminum rims with 185/65/15 tires ,5 spd if it isnt allready and uhh get urlsef some new injectors for that idle problem if u do all that u shud get like 30mpg on the highway
The dude asked about gas milage and easy ways to improve it, and you tell him how to spend between 1000 and 4000 dollars, and only get a tiny bit of extra power, considering he's upgrading a sports car, and could turbo it for that, or if show is his thing, wheels, paint, slam.

Just sayin'.

OP, I suggest you seafoam it, get a CAI if you must, clean or replace all filters, change all fluids, make sure your tire pressures are good, and if you want, bump them a bit more besides.

Your milage looks about on to me, I wouldn't expect anything to be wrong.

Try driving more gently. Keep RPM's low, don't take off hard, accelerate slow, don't drive fast, don't speed up if you're about to slow down, avoid using brakes and engine brake or coast down in neutral as much as you can. Buy the best quality gas you can, if you put crap in your car it will run like crap, and you end up getting less for your money.

If you think there's something wrong, check the ECU for codes. If it idles high after it's warm, clean junk out and look at codes, or else it's just not warmed up yet.

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HerePiggyPiggy
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Joined: Sat Jun 26, 2010 7:16 pm
Car: A turbo'd piggy

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LOL MPG? you should sell your 240 and get a reliable honda.


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