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.
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 6-20-2009
Filled up today:
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 to me as to how they are so good. When you factor in that I leave the truck running with the air conditioner running full blast quite a bit then the numbers take on an even more impressive slant.
Overall I am still very pleased with the fuel economy numbers I am getting with the modifications I have done. I am curious to see how (or if) the numbers change after replacing the failed O2 sensor on the passenger side manifold. I am replacing the O2 sensor with another Denso which I ordered from sprakplugs.com. I am hoping to have it in about a week and then the first opportunity I have I will get it installed. I am not sure if the failed manifold O2 sensor can create any other problems but I do not want to give it any opportunity to do so.
Just as a word of caution for those of you who may be considering doing your own maintenance work; when replacing O2 sensors only use Denso or NGK – never use Bosch. While Bosch is a quality product they do not play well with Toyota. Wherever possibly always use OEM parts as many aftermarket parts are of inferior quality – brake drums readily come to mind as an example.
As always, if you have any questions please do not hesitate to email us. For more information about my testing take a look at my personal blog at Tundra Fuel Economy. Feel free to drop in, look around, and drop some comments or ask questions.
- 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 to me as to how they are so good. When you factor in that I leave the truck running with the air conditioner running full blast quite a bit then the numbers take on an even more impressive slant.
Overall I am still very pleased with the fuel economy numbers I am getting with the modifications I have done. I am curious to see how (or if) the numbers change after replacing the failed O2 sensor on the passenger side manifold. I am replacing the O2 sensor with another Denso which I ordered from sprakplugs.com. I am hoping to have it in about a week and then the first opportunity I have I will get it installed. I am not sure if the failed manifold O2 sensor can create any other problems but I do not want to give it any opportunity to do so.
Just as a word of caution for those of you who may be considering doing your own maintenance work; when replacing O2 sensors only use Denso or NGK – never use Bosch. While Bosch is a quality product they do not play well with Toyota. Wherever possibly always use OEM parts as many aftermarket parts are of inferior quality – brake drums readily come to mind as an example.
As always, if you have any questions please do not hesitate to email us. For more information about my testing take a look at my personal blog at Tundra Fuel Economy. Feel free to drop in, look around, and drop some comments or ask questions.
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