<FONT COLOR="green">Car: 2000 civic ex sedan MT

Mods: NONE - bone stock

Miles: 69,000

Driven: like a granny, shifting 60% at 2500rpm, 40% at 3,200 rpms

Clutch: stock still grabs okay

Spark Plugs: NGK at autozone... pregapped

Air Filter: OEM replacement

TESTED: full 10.5 to 11 gallons to almost bone dry.... have been doing this test almost every time I fill up

Weather: I'm in MN... weather does not seem to affect it very much at all
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Okay I got this car 1yrs ago(new spark plugs)...right when I got it I always seem to get <FONT COLOR="blue"> 290-315mpg on full tank (hwy/city)</FONT>.... after driving 15K on the same spark plugs; the past 2 months I've been getting <FONT COLOR="red">350-370mpg on full tank.</FONT>

Last week I change spark plugs and they were fairly bad. BLACK & basically worn down to the crown. The motor did have better throttle response but nothing to get excited about...... BUT I instanly saw change in MPG after 1-2days of driving it.


WTF? I bought my civic to get good gas milage....
290-315 MPG on 11gals IMHO is not all that great

Any thoughts?

 

yeah not sure what happened, but thats shitty milage, thats like wat 28mpg.... o2 should be fine at 60k miles....sure you didnt get a bad batch of gas??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DecentCivicZ6 &raquo;</TD></TR><TR><TD CLASS="quote">sure you didnt get a bad batch of gas??</TD></TR></TABLE>

99% sure I did not get batch of bad gas.
I've tested MPG every time I fill up since the day i got the civic (yeah I'm pharanoid like that)

<FONT COLOR="orange">
It's as if my car hates new spark plugs or something...
When I got the car it had new plugs...... 290-310mpg
with 15K on spark plugs it gets ......350-370mpg
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Charlie Moua &raquo;</TD></TR><TR><TD CLASS="quote">

WTF? I bought my civic to get good gas milage....
290-315 MPG on 11gals IMHO is not all that great

Any thoughts?
</TD></TR></TABLE>

my thought is if your getting 290 - 315 miles per gallon then your getting incredible gas mileage

 

Please do not rely on the pre-gap. I would check the gap again.

I just regapped my plug's and noticed better MPG and smoother rev's.

I am seeing 280 to 300 on 9 gal fill up. You got me beat.

 

I'd definately check the gap out on the plugs. You'd be surprised at the number of little things that can make them close close up.

 

check out the gap on those plugs.