While switching to LM, I am not expecting a big change is fuel economy...I'll update fuel averages in near future iA...
But what i have experienced in last couple of days that after oil change, the pick/acceleration of the car has increased a lot, means about 30-40% increase, and it is moving like breeze, take no time to reach 110 or 120 km/hr... Don't know the improvement is due to oil or due to new filters etc...