Buster, I'm getting great mpgs in my Civic Si with Havoline. 27-28/32-34. EPA figures are way lower.
We get 30-31 mpg always, sometimes almost 32, in our '04 V-6 Accord at 75-82ph. Early oil was GTX and got 29-30, then
Mobil1 1 30-31.8, and now Syntec gets about the same as Mobil 1...WORST was...