Hello I'm 2 weeks into owning my 1st mdx.. 2007 with 117,000 on the od.love it so far but I'm having some issues with the hands free link not working.... is it worth replacing or go with aftermarket Bluetooth device? Plus I'm getting horrid gas mileage.according to the trip comp. I'm averaging 10.4 mpg. It doesn't seem to change from city to highway...I've put premium fuel in it as recommended....is the premium fuel really necessary...keeping in mind it has 117,000 miles and 10 yrs old...any info would be greatly appreciated....