Which engine do I have?
I am under the impression that the 5.4 & 6.8 in the E series are 2 valve versions unlike the 3 & 4 valve versions found in the F series. However, after Floorguy mentioned he had found a tuner for the 2008 E series, I went looking and found that Diablosport Predator lists the one for the E350 as only applicable to the 3 valve versions. So which engine did Ford put in the E series in 2008?
If a tuner really improved fuel economy by 2 MPG as claimed, recouping the $275 sale price would only take about 6 months.
"there is neither science nor fact prevailing here" - vlamgat