PART 1: I have a 2013 Honda Crosstour V6 4WD with 144736 miles. 2 months ago I have new plugs and coils installed and month 3 months ago I installed a new air filter. Before this work was done was I getting about 17- 19 mpg since then I'm getting about 13-15, Yes huge differences. At one point it had a bad hesitation in between 3 and 4 gears and if I would try to accelerate quickly it didn't seem to want to responded. However since then I started filled using 93 octane to fill up a couple of time and added Lucas fuel treatment in there the hesitating as subsided some but not completed gone. Engine light is  NOT on it's NOT  throwing codes I've have a mechanic scanner on it, as we were sitting there with the vehicle idling we could see the fuel usage steadily dropping. It using entirely too much fuel I can burn and a half a tank of fuel in  100 MILE TRIP.

Part 2; Steering wheel shaking and at time its a hard almost like a snatch. Doing the aliment while driving test it doesn't pull one way or the other.

Thanks In Advance. 

HWMASON