I found these comments of his interesting:
"How to maintain my CX-5 so it'll last?" Transmission+differential+transfer case fluid every 50K miles (remember, there is no such thing as "lifetime fluid", manufacturer says there is just because of EPA and CAFE standards, so they could show that maintaining the vehicle requires less crude oil products... For them, "lifetime" means the lifetime of the warranty period), coolant flush every 5 years, brake fluid every 5-10 years, oil change every 5K miles at most (with none-turbo) and 3K with turbos (unless you want your engine to start burning oil early), spark plugs every 60K miles (none-turbo) and 35K turbo at most, to keep your coils healthy. Replace your engine air filter and cabin filter every year, regardless... Your MAF sensor and blower fan will thank you for it, and the better mileage you'll get from a new engine filter will pay for itself (if you'll do it by yourself, which is a 3 minute job)... Do the cabin filter yourselves too. Both air and cabin filters you can go aftermarket, because you replace them frequently. Don't get high flow filters, or filters that are too restrictive.
Edit: apparently people are not happy with the shorter explanation version of why CDA is bad (for all manufacturers), so here's the long one: Thermodynamics. When you turn off two cylinders and the two others are firing, it means two cylinders are running colder than the other two. All cylinders share the same block and cylinder head. When some parts of the cylinder head are colder than other parts, the rate of expansion and contraction is different between areas of the same block of metal. Those stresses, in turn, can lead to either micro fractures in the head (cracked cylinder head eventually), or out of round of the bores (oil consumption eventually). This isn't just a Mazda problem, it's a problem with other manufacturers as well. Search "Chevrolet cylinder deactivation issues", or "Honda VCM issues" and see. Same issues across the board.