Mazda CX-5 2012 Problems

You have to believe that Mazda has beefed up the mechanical components that take the extra load of systems like the stop-start system, so there's no reason to believe they will wear out or fail faster than they would on a car without the system. That said, I wouldn't use it if it were fitted to my car, the fuel savings are so small it's hardly worth the trouble.

Mazda told us that the fix to rectify CX-5 models affected by oil dilution issues has been made available. Along with a simple software update to modify the operation of the Diesel Particulate Filter, a revised dipstick will also be fitted. Mazda dealers have been contacting owners of affected vehicles to arrange to have the fix applied under normal warranty provisions. The software change should affect the operation of the filter and fix the problem, so you shouldn't have any more trouble with the oil level rising. Talk to your dealer and make sure your car has the fix.
 

The software fix alters the purging of the particulate filter to overcome the problem of diesel getting into the engine oil. It would seem that Mazda is saying that it's ok for the oil to rise to the new level without causing any problems. You would have to believe that Mazda has done some testing to verify that and is now content that with the two fixes the problem has been eradicated. Anyone with a CX-5 should contact their dealer about getting their car updated.