[hodocka]

Thanks! I have come to the same conclusion about the T.B. spacer. I bought the K&N air intake system and am taking great pains to make sure I install it properly. I plan to change to synthetic oil in the differiential. What about using synthetic motor oil, some say it helps MPG. Anything else besides maybe a flowmaster muffler that may help? I have already started using lucas oils fuel injector cleaner. My truck only has 25k miles, the factory air filter looks brand new. I understand that some of these mods may help more if say the filter and injectors were more dirty to start with. I hope I can tell a difference. I am averaging 16-17 MPG now but most of my driving is around town. Thanks to all for this great site!