I don't know if anyone else is having this issue, but I currently have 44,000 miles on my 2014 Audi Q5 2.0. I have followed all the maintenance to the T. It appears that since I have changed the spark plugs (w/ OEM), it appears that my gas mileage has significantly dropped. I don't really think it is the plugs, since they are the same ones I removed.

Previously, I averaged 400 miles to a tank of gas. Now I get about 280 to 300 miles to a tank. My driving habits have not changed and I have been using BP 93 octane since day 1.

Is anyone having this issue or has anyone ever heard of anything like this. Any recommendations and/or solutions would be helpful before I contact the stealership for help.

Thanks

Nick