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Old 03-14-2011, 01:31 AM
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LittleHoov LittleHoov is offline
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Re: differential oil question

About the only thing you can do to get better mpg is make sure everything is tuned up properly, make sure you have no exhaust leaks, especially around the manifolds.

You can switch to shorter tires, or narrower tires, or do both. You could re-gear if you dont already have 3.07s (highest gear ratio ive heard of in an XJ).

One thing I have heard several people agree on is to make sure you have aluminum wheels and lightweight tires. Makes sense to me. I have factory steel wheels and 6-ply LT rated tires, and theyre heavy as crap, takes more power to get them moving....tires for my car are only a couple inches shorter but weigh a lot less because its got aluminum wheels and touring tires.

Most of these things would take a long time to pay for themselves. One free thing you can do is reduce the weight of the vehicle...if youre one of those people that carries around 500 pounds of gear everywhere you go...trim it back a little.
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2000 Oldsmobile Intrigue 3.5 DOHC V6
Mods: Fenderwell Intake, High-Flow cat, U-bend delete, 12-inch front rotors, GMPP handling kit, 20% tint, Pioneer front and rear speakers, Eclipse HU, cleared corners
1986 Jeep Cherokee 2.8 V6
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