I'll tell you, but you'll just get mad because you are emotional and weird about your cx5, and because you've read reviews saying it's the most reliable vehicle in 15 years??? LOL. Believe that if you wish, the vehicle came out in what, 2012-13? It hasn't been out 5 years. Online reviews are some of the most worthless junk out there, imho.
Anyway, I had some carbon buildup early on - withing a year, before 20k. Mazda explained this was due to the direct injection, and that was just life with DI. Fine, cool. I really trusted and liked my service advisor, he was a good guy, and at the time he was looking at cx5 for his wife. This was when I was driving mine 60mi highway every day, so not many short, cold trips. Service asked me how long I planned to keep the vehicle as that would determine how I should maintain it. I just bought the thing and I wanted to keep it 10 years, at least. I'm not a car guy, don't want car payments, etc. OK, he strongly recommended fuel injection cleaning every 15k to fight engine buildup. I did the BG induction service at 20k, then at 35. Engine was responsive and felt amazing. I also changed trans oil at 30, rear diff same time. Car honestly felt better to me than when it was new. Just well broken in and responsive, the ride was more harsh, but understandable. That's when I discovered my oil was well above the full mark on my dipstick. I didn't like that, I didn't really know what that meant. Service was a little more mysterious about this. It wasn't a big deal to them, but that's also why they recommended 5k oil changes with fully sythetic...that oil is capable of 10k. OK, fine. I asked my guy what that meant for me say, 8-10 years down the road. He told me he didn't know. He also told me he's seen 2.5s at that shop with dead engines and transmissions before 60k. More than a few is what he told me. He said being this is a new vehicle, they just don't know. That's why he strongly advised me to do injection cleaning and keep my trans fluid fresh. Ok, cool. Not really what I had in mind when I purchased the car. Also, my commute changed drastically after 2.5 years, I was no longer doing 60mi highway daily. I decided, based on the maintenance costs, not so great resale value, the unproven engine/trans, and my new driving schedule, that I should trade this vehicle in while it was still worth 20k. So I did, and I feel I made the right decision for me. This was not a car I felt great about keeping for 10+ years, so that's why I'm advising OP to look at all his options if he's looking for a vehicle that will last him 10+ years, and one that he'll be very happy with.
Again, just compare the price to other vehicles. I was actually kind of shocked when I saw you could get a Rx350 with 60k listed at 24k, so you could take that puppy home today for 21-22k. A damn lexus CUV/midsize...idk what a RX is technically, it's a bit bigger than a cx5, true luxury vehicle that came before these little 4cyl copy cat CUVs every manufacturer makes because they have to meet govt standards....Anyway, yea. And if you don't need AWD + clearance, you can probably find some great, luxurious sedans for great prices, maybe even AWD sedans. Idk. I just know there are a ton of car options out there, so fully explore all those options. Audi's seem very popular and fun to drive. Explore what they have to offer used.
Don't just settle for a cx5 because you read it's fun to drive.
I tried the new small engine CUV craze, had fun, and learned a lot about the new car business in the process.