After coming across an article written in December 2012 quoting the Mazda Public Relations Manager stating that there was a fix for the problem of the oil level increasing in the Mazda CX-5 diesel (software update and new dipstick) and Mazda had already begun contacting affected owners I contacted two Mazda dealers about it. Firstly, three months after that article, I had not been contacted by Mazda to have my car reworked. Secondly, the first dealer told me that they were unaware of any fix. The second dealer said the same thing, but then searched around on his computer and found that there was indeed a fix and I booked my car in to have the work done. The “fix” is a software update, which I assume does something. The second part of the “fix” is a new dipstick. The only difference with the new dipstick is that the “Full” mark has been moved up to the level where the “X” (danger level) mark was on the old dipstick. Is Mazda now telling us that this level, which they previously had us being paranoid about having to change the oil, is now perfectly acceptable and is not going to damage the engine?
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.
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