How to get better mpg

[Chaos325]

My 91 lx auto wagon is topped out at 23 mpg and I'd like to get a little more out of it. I currently have a short ram intake, 7mm double silicone wires, new 8 gauge grounds, 640 cold amps battery, stripped cat, platnium 4 tips, full tune up & oil change. Ignition timing is okay I think, its in between. Maybe switching to Split Fire plugs and 8mm wires?

[Stealthman80]

you should be using stock ngk zr5f-11 plugs, and stock honda wires. also make sure your tires are properly inglated and you o2 sensor is good. it should be noted that the cars only rated at 22 mpg in the city so your actualy pretty good

[Chaos325]

you should be using stock ngk zr5f-11 plugs, and stock honda wires. also make sure your tires are properly inglated and you o2 sensor is good. it should be noted that the cars only rated at 22 mpg in the city so your actualy pretty good

Alignment is good. I had it done after repairing the front end. I bought the wagon front end'd hard in a auction. O2 I don't know but wouldn't it throw a code if it was bad? I guess I should ditch the platnium 4 tips, I thought they would help with the fuel economy. My acura gets 29mpg using splitfires.

[de4ek]

I'd go back to the stock plugs and wires....... 23 mpg is great. i need to figure out what i'm getting...

[Gemini]

I'm getting nothing close to that.....

[d112crzy]

i get 26mpg with tons of racing and 31mpg on the highway.

[deevergote]

Intake and exhaust mods decrease fuel economy unless you tune the ECU... at least that's been my experience.

The hollow cat is doing NOTHING to help you either... it's probably hurting power and economy, in fact.

Platinum 4s gave me crappy mpg too. They suck. I just use NGK Irridiums and NKG blue wires. I'm getting 28-32 with some hard driving.

[accrdpower]

the platinum plugs are fine...although they work for some f22's and not for others. honda wires have a lil more resistance than some aftermarket wires so find some better wires with the least resistance (i have msd superconductor wires). bigger is not better in this case but resistance is the key. here is a list of things to do/check to increase mileage:

oil change
change fuel filter
get better wires
check plugs
make sure air filter is clean
get ground wire kit
check for air in coolant/flush if need be
change cap and rotor if need be
test battery
run seafoam in IM and put 1/2pint in gas tank
clean out IACV
clean EGR/remove and put block plate on
check and change tranny fluid if needed
adjust idle to specs
clean out TB
check O2 sensor
get new cat
check for proper tire inflation
get alignment
don't drive like a maniac

with all the engine mods i have done, i have increased my MPG on average 10-12. i used to get 19-23mpg. now i get 28-32 sometimes even more. it's the basic maintenance and the lil performance mods that make such a big difference.

[Ant]

^^^Nice list. But do i really need a ground kit to get better mpg? Curious to know how that helps.

[NAiL05]

Guttin the cat disrupts exhaust flow. Ease off the pedal, keep your revs down, do proper maintenance you should be good.

[kmart64]

alignment is pretty important. AFter I lowered my car, I didn't get alignment till like 4-5 months later, and it really helped me. I could definitely tell how the car was easier to steer.

[NAiL05]

alignment is pretty important. AFter I lowered my car, I didn't get alignment till like 4-5 months later, and it really helped me. I could definitely tell how the car was easier to steer.

True and dont forget to keep your tire pressure correct too that will help out.

[koffin]

True and dont forget to keep your tire pressure correct too that will help out.

This helps more than people realize. Fill them up to the full "cold inflation" amount. This will reduce the size of your contact patch, or the amount of rolling resistance on the the road.

Possible other things to check:

Are your brakes dragging?
Run some concentrated injector cleaner through. Maybe back to back fill ups.
Valve adjustment.
Is your wag full when you driving? Get rid of the stuff you don't use.
Otherwise, there are some very good suggestion listed above.

Good luck.

[eightyfour84]

the platinum plugs are fine...although they work for some f22's and not for others. honda wires have a lil more resistance than some aftermarket wires so find some better wires with the least resistance (i have msd superconductor wires). bigger is not better in this case but resistance is the key. here is a list of things to do/check to increase mileage:

oil change
change fuel filter
get better wires
check plugs
make sure air filter is clean
get ground wire kit
check for air in coolant/flush if need be
change cap and rotor if need be
test battery
run seafoam in IM and put 1/2pint in gas tank
clean out IACV
clean EGR/remove and put block plate on
check and change tranny fluid if needed
adjust idle to specs
clean out TB
check O2 sensor
get new cat
check for proper tire inflation
get alignment
don't drive like a maniac

with all the engine mods i have done, i have increased my MPG on average 10-12. i used to get 19-23mpg. now i get 28-32 sometimes even more. it's the basic maintenance and the lil performance mods that make such a big difference.

why remove and put a block plate on the egr valve? i thought egr was beneficial for a better mpg?

[K2e2vin]

-keep car as light as possible(dont haul around stuff you dont need)
-maintain the engine well, fluids, etc.(also switch to a single ground electrode plug like stock, honda systems arent really designed for multiple electrode system which require more power to get as hot as a single)
-low rolling resistance tires and correct tire pressure, correct alignment, etc.
-keep windows closed if possible
-try to get up to cruising speed quickly; acceleration uses more fuel than cruising/coasting(hence why city mpg is worse than highway)
dont worry about the revs, just focus on minimizing the amount of throttle opened(remember, the ECU increases the amount of fuel according to load also. when you upshift and have to give it more gas to maintain speed, your mpg will go down).
-check compression/leakdown test.