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How to get better MPG?

 
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Old 10-07-2007, 04:59 PM
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How to get better MPG?

I was wondering what you can do to improve the gas mileage on the 5th gen Prelude, I assume lighter pulleys would help, maybe a port and polish, cams, lighter connecting rods etc.? Does running leaner help? I have a '98 SH and I want to drive it in to the ground. Thanks in advance. --MCK

Last edited by mckillio; 10-20-2007 at 12:07 AM.
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Old 10-20-2007, 12:08 AM
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No? No one has noticed any improvement with any mods they've done?
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Old 10-20-2007, 12:15 AM
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-i know the platinum does a lot
-clean oil helps, or do what i do! Synthetic! helps with the MPG's alot.
-making the car lighter makes the engine work less because its got less to drag
-if you've got a 5sp then the better you shift start and go, the better youll be, if it takes you 20 minuets to get going cause your scared of the clutch, its gonna happen lol.
- im not too sure about running leaner, but in the end, to get up to the speed limit, youll use the relative amount of gass, and your engine is probably gonna rattle a little heavier? [correct me if im wrong here PZ]
-make sure your wires and distrib. are good!

hope i helped!

Edi: 5th gen SH is very heavy, 5th was heavier then the rest, but im sure the sh is more cause of the extra components. Loose the spare jack and tools, get AAA lol
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Old 10-20-2007, 08:35 AM
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Generally, to get better gas mileage you should do these things:

-Check your tire pressure for correct PSI
-Check/replace your air filter or get a intake of somesort(it will help with MPGs)
-Shift moderately, dont always drive in Vtec/YOUR driving style
-Replace your fuel filter(if it hasn't been done)
-Replace o2 sensor(if it hasn't been done) - a good start for better MPG's

The things you've listed are "performance" mods...
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Old 10-20-2007, 05:27 PM
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Ya I agree to the above list. Most importantly if driving from block one to block two, no need to gun it everytime if you are doing so. Drive moderately
and make sure everything is in good working condition.
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Old 10-20-2007, 05:55 PM
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Quote:
Originally Posted by Prelude13 View Post
Generally, to get better gas mileage you should do these things:

-Check your tire pressure for correct PSI
-Check/replace your air filter or get a intake of somesort(it will help with MPGs)
-Shift moderately, dont always drive in Vtec/YOUR driving style
-Replace your fuel filter(if it hasn't been done)
-Replace o2 sensor(if it hasn't been done) - a good start for better MPG's

The things you've listed are "performance" mods...
x2

-Driving style is really important too. Don't race from stop light to stop light. Drive efficiently. If your foot is constantly on the brake, even in bumper to bumper traffic, you're not driving efficiently.
-Use cruise control on long drives
-Lighten your load. Take all that junk out the trunk. Lightweight wheels, CF parts, smaller wheels.
-check your spark plugs % wires, timing, cap & rotor. (if it needs to be changed at the proper interval)
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Old 10-20-2007, 09:20 PM
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Old 10-21-2007, 02:25 AM
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I just ordered NGK plugs, MSD cables, rotor, cap and external coil. I just hit 80k miles and the owner before me never had any of that replaced. I didn't know about the o2 sensor thanks, the fuel filter makes sense but I hadn't thought about that.

I realize that I was talking about "performance mods" but I'd imagine that they would have an effect on your mileage as well. Pulleys make the most sense because the engine doesn't have to work as hard for the same speed.

As far as the driving tips I already practice all of those. Apparently removing the wheel wells (in good weather) drops 45lbs and helps to cool the brakes better.
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Old 10-27-2007, 07:09 AM
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Thinner weight oil will give less friction to the engine, but could increase the oil consumption.
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