So, was just checking out the consumer reports site for the 2021 CX-5 and they recommend it. Looking at the what the owners say per CR:
Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.
What Owners Say
Cylinder head
"Manufacturing defect with small valve guides allowed excessive oil use."
Anonymous A., TX (2021 Mazda CX-5 Grand Touring 2.5-L 4 Cyl turbo)Other major engine problem
"Repair process inadequate and only after excessive effort. Bandaide type repair for major design defect."
Anonymous A., TX (2021 Mazda CX-5 Grand Touring 2.5-L 4 Cyl turbo)Turbo or supercharger
"Low oil light came on. A small amount of the engine oil was leaking into the combustion chamber (on Turbo models), causing oil consumption. Per Mazda, the repair was only temporary, and a root cause is found, they will inform me of the repair procedure (if any)."
Anonymous, GA (2021 Mazda CX-5 Signature 2.5-L 4 Cyl turbo)
"We had to get oil a month after getting our oil changed and the exhaust was smelling very foul. Turned out the turbo was the cause."
Anonymous A., OH (2021 Mazda CX-5 Signature 2.5-L 4 Cyl turbo)
"Turbo has a known oil consumption problem. Dealer fixed it free of charge, and it involved some valve work."
Anonymous, UT (2021 Mazda CX-5 Carbon Edition 2.5-L 4 Cyl turbo)
Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.
4 / 5
What Owners Say
Oil leaks
"Technical service bulletin we had to point out to dealership"
Anonymous A., HI (2021 Mazda CX-5 Signature 2.5-L 4 Cyl turbo)
"Low oil light came on. Oil level 1 quart low. A small amount of the engine oil may be leaking into the combustion chamber, causing the oil consumption. Per Mazda, confirmed this will not cause any immediate engine damage and the vehicle may be safely driven. Per Mazda, this was a temporary repair and as soon as Mazda identifies the root cause, a complete repair procedure will be announced."
Anonymous, GA (2021 Mazda CX-5 Signature 2.5-L 4 Cyl turbo)Other minor engine problem
"Turbo charged engine using about 1 quart of oil every 4500 miles, which I feel is excessive. Was advised by the dealer service manager that this was a condition experienced by the turbo engine and that the manufacturer was aware of this but had not issued a solution yet."
Anonymous, FL (2021 Mazda CX-5 Grand Touring 2.5-L 4 Cyl turbo)
"The oil consumption issue for the Mazda 2.5 turbo engine is known to Mazda but, according to them, the cause is unknown; therefore, no remedy is known. It has experienced the problem since new; we had to add oil before the first scheduled oil change. The engine consumes approximately one quart of oil every 3-4K miles."
Anonymous, FL (2021 Mazda CX-5 Sport 2.5-L 4 Cyl turbo
Seems all of the reports from owners are from the 2.5L Turbo model.