Average gas mileage gone wrong on my 4.7?
1- I tune up everything, last was transmission oil
2- Have not done this yet gonna do it sometime this year
3- I run my codes and comes clear
4- Gonna check that
5- I run it now and then
No mods on the engine, I have flowmasters 40 series Y pipe, KN air filter just the filter
2- Have not done this yet gonna do it sometime this year
3- I run my codes and comes clear
4- Gonna check that
5- I run it now and then
No mods on the engine, I have flowmasters 40 series Y pipe, KN air filter just the filter