Well I just got a lesson in octane, checked into this one out of curiousity and went to school. Let me throw you fuel experts a bone. I run a Mondeo V6 Dual fuel system. Runs Premium on the gasoline side and compressed natural gas [via a Bugatti System] I can switch back and forth from fuel to fuel, ie: leaving the city and entering the Autopista and switch over to gasoline. [ I use CNG primarily in the city because it's inexpensive and it burns very clean]In either case I detect no difference in performance. And the engine seems very smooth on either.
