Toyota Tundra Forums : Tundra Solutions Forum

This blog is about my search for better fuel economy for my truck. I have a 2004 Toyota Tundra Double cab with a V8 engine, four wheel drive, and a four speed automatic transmission. Of all the years the Tundra has been available it appears that the 2004 DC truck, because of its size and engine/transmission configuration, gets the worst mileage of all the Tundras. The Gross Vehicle Weight of the truck is 6600 pounds and the EPA fuel economy rating for the truck is 14 mpg in the city and 17 mpg on the freeway. In all honesty these fuel economy figures are both generous and unrealistic.

I have a personal Blog with more detailed information about my testing and my findings. Detailed spreadsheets of my fuel economy and test conditions can be emailed from my email account at highwaylizard@gmail.com

Please feel free to subscribe to my blog here on this forum through the RSS feed or my personal Blog.

Thanks for looking and ask any questions you may have.

MPG Numbers 6-22-2009

Posted 06-30-2009 at 11:53 PM by Highwaylizard

Filled up today:

86.7 miles all city driving
No trailer A/C all the time
5.717 gallons Shell87
15.1653 MPG
No previous city without trailer and air conditioning to compare it to

Normally I run the truck down to at least a half a tank before fueling up. This fill-up was done in order to top the truck off prior to hitting the highway to Dunes National Park in northern Indiana. There is nothing else to report on as these numbers are right where they should be. I am still pleased...

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MPG Numbers 6-21-2009

Posted 06-29-2009 at 03:12 PM by Highwaylizard
Updated 06-29-2009 at 03:20 PM by Highwaylizard

Filled up today:

209.0 miles all city driving
Mostly trailer with A/C all the time
13.809 gallons Shell87
15.1351 MPG
0.0156 increase in MPG since last of city driving with trailer and A/C

These numbers are really good considering the conditions under which they were generated. This is all in town driving with a trailer for more than half the miles and the air conditioning running all the time. Not only that but the truck idled quite a bit with the air conditioning...

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MPG Numbers 6-20-2009

Posted 06-29-2009 at 02:56 PM by Highwaylizard
Updated 06-29-2009 at 03:21 PM by Highwaylizard

Filled up today:

285.2 miles all in town driving
No trailer but air conditioner running all miles
17.207 gallons Shell87
16.5746 MPG
1.7585 increase in MPG since last of in town driving

All in town without the trailer. I ran the air conditioner for all of these miles. The numbers are actually a little better than I normally get in town without the trailer and no air conditioning. The fact that I ran the air conditioner the whole time makes it a little confusing...

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MPG Numbers 6-17-2009

Posted 06-24-2009 at 11:53 PM by Highwaylizard
Updated 06-29-2009 at 03:21 PM by Highwaylizard

Filled up today:

247.4 miles
Some trailer with the air conditioning running
16.363 gallons Shell87
15.1195 MPG
1.4121 increase in MPG since last of highway driving

These numbers were generated in town while pulling the trailer for the landscaping business. While an improvement over the previous set of numbers the cause of their improvement in light of the failed O2 sensor and while running the air conditioner for the first time this year is a mystery. I am wondering...

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MPG Numbers 6-14-2009

Posted 06-24-2009 at 11:36 PM by Highwaylizard

Filled up today:

181.5 miles all city driving
All trailer
13.241 gallons Shell87
13.7074 MPG
2.1806 decrease in MPG since last of in town with trailer driving

These numbers are the result of pulling the trailer in town while running the mowing route. The mowing route involved some 24 start-ups and shut-downs from one property to the next. The numbers also seem to have taken a hit from the failed O2 sensor on the passenger exhaust manifold. Interestingly the mileage...

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