[blue17]

Has anybody tried fuel economy with 91RON compared to 95RON (as recommend for max performance and fuel economy? Mine runs fine as far as power and driveability goes on 91RON but fuel is usage is averaging about 11.4 compared to previous diesel at about 6.5. Hard to justify the 20% difference in price depending on price cycle. Also can't understand how Falcon ecoboost gets nearly identical power and torque figures but better fuel figures with a lower compression ratio and heavier vehicle and based on using 91RON.