Hi all,
First time posting and I could use a little advice/help please.
In case this is required, I bought the car used in January of 2016 and it had about 37k miles on it. It currently has about 64k miles and I live in Dallas, Texas.
Here are a few lingerings issues I have with my 013 EX-L AWD.
1) When its cold outside (yes it does get cold in Texas, LOL

) I cannot open the tailgate, its like its frozen shut. I can open all of the other doors with no issues. Someone suggested that maybe moisture is to blame but I even if there has been no rain, it still seems like its frozen. This morning it was about 30F and I could not open the tailgate. I should probably also add that when I am at my apartment or at work, my car is in a parking garage so it is not being completely exposed to the elements.
2) When I bought the car, the tires quite a bit of ware so I knew I would have to get new tires in about a year or so. In July of 2017 at about 52k miles, I bought new tires. Since then, my gas mileage dropped from about 25mpg to about 21mpg. Is this even possible? Seems like a steep drop by just changing tires. The tires that came with the car were the original factory tires (Continentals?) and I replaced them with Goodyear Assurance CS Ultratour (based on reviews, they seemed like a good tire at a good price).
3) So this one is weird… when I drive in the expressway at 60mph+, there is some heat coming right at me from the vents even though the heat is off. This morning (again, it was about 30F), I was going about 70mph I turned the heat off and a lot of heat was coming right at me. Obviously, this is coming from the engine (there is a slight stench to the heat). Seems to me that the vents are not working correctly. Any ideas on this one?
I plan on taking my car to the dealership tomorrow (yea, I should have posted earlier) but I would like to know what to expect.
Any advice/help would be greatly appreciated.
Thanks in advance.
Dan