10-06-2012, 04:52 PM
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#1
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Join Date: Jul 2012
Location: Clarksville, TN
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Member
Join Date: Jul 2012
Location: Clarksville, TN
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MPG Increase
So I spent the weekend giving my new to me 2003 V8 4wd with 102K miles some much needed TLC. I replaced the timing belt and water pump. Drained and filled the motor, transmission and transfer case and filled with synthetic fluids. Flushed the coolant. Removed a K&N air filter the previous owner had installed and replaced it with a Toyota one. I also cleaned the MAF sensor and removed the HCF from the air box. Lastly I installed new Denso Iridium plugs. After all that I have noticed a pretty good improvement in my MPG. I was getting about 16.8mpg and now I am getting about 20.5mpg (22mpg by the computer). I dont think the transmission fluid, transfer fluid or plugs had ever been changed by the look of it. Two days of work was definitely worth it to get it running a lot better and I am loving the mpg increase. Next I am going to do the diffs which I'm sure have never been changed either.
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10-06-2012, 05:25 PM
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#2
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Senior Member
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Join Date: Jun 2007
Location: New Hampshire
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Senior Member
Join Date: Jun 2007
Location: New Hampshire
Age: 67
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If the plugs were actually 102k miles old then they were a good candidate as to your increase. But being iridium had NOTHING to do with it. You would have gotten the same results with copper core plugs.
Cleaning a dirty MAF sensor is also a good bet as to your increase gas mileage.
It's always good to change your fluids. But they will have little to no help to increase gas mileage.
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10-07-2012, 03:33 AM
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#3
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Location: Ontario, Canada
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Iridium had EVERYTHING to do with it 
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SOLD Jan/15
03 V8 4x4 Limited, RAS converted to coil w/1.5 spacers, Bilstein 5100's 2.5" setting, 265/70R17 Grabber AT2s, FJ Rims, Custom headers, dual exhaust, 20% tint, HCF delete, VSC off mod, blacked-out headlights, WeatherTechs, TRD shift knob.
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10-07-2012, 08:26 AM
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#4
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Join Date: Sep 2012
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Don't our engines require iridium plugs? I know the V8 does.
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Current - 2017 TRD ORP. Nautical Blue
Previous - "TRex" - 2004 Sport Edition V8. 2000 SR5 Sport
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10-07-2012, 09:14 AM
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#5
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Quote:
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Iridium had EVERYTHING to do with it
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I have this bridge in Brooklyn for sale.
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10-07-2012, 10:32 AM
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#6
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I know that Iridium had nothing to do with lol. That's what is in it from the factory. I just putting out info on what I did.
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10-07-2012, 05:11 PM
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#7
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Quote:
Originally Posted by MikeInNH
I have this bridge in Brooklyn for sale.
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And I have this thread that requires some negativity...maybe a couple words in all uppercase letters too!
__________________
SOLD Jan/15
03 V8 4x4 Limited, RAS converted to coil w/1.5 spacers, Bilstein 5100's 2.5" setting, 265/70R17 Grabber AT2s, FJ Rims, Custom headers, dual exhaust, 20% tint, HCF delete, VSC off mod, blacked-out headlights, WeatherTechs, TRD shift knob.
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10-07-2012, 08:40 PM
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#8
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Senior Member
Join Date: Jun 2007
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Age: 67
Posts: 1,833
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Isn't it your bedtime.
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10-08-2012, 04:30 AM
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#9
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Quote:
Originally Posted by MikeInNH
Isn't it your bedtime.
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Sorry OP, I won't keep this thread off topic anymore, I just couldn't resist winding up the jack in the box. Carry on with your exceptional gas mileage
__________________
SOLD Jan/15
03 V8 4x4 Limited, RAS converted to coil w/1.5 spacers, Bilstein 5100's 2.5" setting, 265/70R17 Grabber AT2s, FJ Rims, Custom headers, dual exhaust, 20% tint, HCF delete, VSC off mod, blacked-out headlights, WeatherTechs, TRD shift knob.
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10-08-2012, 09:39 AM
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#10
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Senior Member
Join Date: Jun 2007
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Age: 67
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Sorry TRDCal...didn't mean to make you cry.
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