March 26, 2011First off, I should state that I religously write down my mileage everytime I go and fill up my gas, I use the same calculations and use the same gas station pump everytime I fill up (unless im out of town) and always use the same method to calculate my exact mpg.
That being said,
I replaced/cleaned the following;
1. PCV Valve ($2.99)
2. Cleaned MAF Sensor ($7.99)
3. Cleaned K&N air filter, which wasnt too dirty ($9.99)
4. Replaced a fuel filter that looked like it filtered oil (BAD!) ($5.99)
My 2-year average for every fill up has been 12.46mpg with a low of 11.9 and a high of 12.8.
After cleaning/replacing these few parts my MPG this last trip was......DRUMROLL......13.496 MPG, which is basically an added +1MPG. Now, that may not sound like a lot to some of you, but it is an 8.5% increase in my fuel economy.
Of course, this will take more testing but Im pretty sure it has made a significant difference just by doing these EXTREMELY simple repairs. If you have a truck like mine (165K) and havent replaced these before, I suggest trying it out. It cant hurt, only cost me about $30.
Whats even more exciting is the fact that I still have to replace 2 clogged cats and 2 bad O2 sensors.....which I would imagine will help the mileage out even more, even if just a little bit. I would love to get back above 14MPG.
As for 13.5MPG, thats really not all that bad for a truck that is 13 years old, has 165K miles on it, and a 9" lift with 35" tires on it!