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Not an expert at all, but my guess is that the incentives have the desired impact. Being a smaller, niche manufacturer means any incentives need to be extremely targeted. Mazda sold 7,700 units of the CX-50 last month and 66,000 units for the first 10 months of the year.

I don’t believe sales of the CX-50 are in the toilet…up 145% in October over prior year, and 90% over 2023 YTD. September had a similar sales trend over prior year.

The lab uses FTIR testing to determine coolant and water levels. A negative result means that levels are below 0.1% or 1,000 ppm.

UPDATE: The dealership put their best technicians (including the shop foreman) on the diagnosis...and no issues were found. I pick the car up this evening. 🤷‍♂️

Yes.

I purchased a case on eBay.

Vehicle is a 2021 Mazda 3 2.5 M/T with 60,767 total miles. The oil is Pennzoil Ultra 0W20, and the filter was a Mazda OEM (Japan made by Roki). This is the third oil analysis over the last 15k miles, as I am keeping a close look at the Potassium and Sodium, which has increased gradually (if...

Another Oil Change for the Mazda. Still Pennzoil Platinum 0W20 and Roki filter. 60,760 miles on car and 5,160 on oil (no make-up oil needed). Took sample for UOA to keep an eye on a Potassium trend.

@Urshurak776 I did have the car inspected at the dealer and it passed their pressure test last week. It is time for an oil change so I will do another UOA to see if anything has changed with the Potassium levels…I may also do my own tesing to see if any combustion gases are migrating into the...

Yes, once I get this Potassium situation pinned down, I will look to extend the interval for sure. 5k miles is not much of a challenge for this oil, especially in the Skyactiv non-Turbo engines.

I’m surely hoping the trend will reverse over the next several changes.

Yes, I have a pressure tester. I was thinking of pressurizing the system and taking a peek through the spark plug holes with an endoscopic camera with the pistons at BDC just to see if there are any visible signs of coolant intrusion. I may just send a pair of samples out at the next change as...

Fingers crossed that this is the case, even though the Potassium level is just slightly higher this time. Really hoping that this is not a VERY slow coolant leak that is being burned off in the combustion chamber and will gradually get worse.

I don’t believe Potassium is an additive in this oil. It was a pretty uneventful trip, cruising along at 75 most of the time. A great road trip car!

Vehicle is a 2021 Mazda 3 2.5 M/T with 55,600 total miles. The oil is Pennzoil Ultra 0W20, and the filter was a Mazda OEM (Japan made by Roki); this was the first non-Mazda dealer service. One interesting data point for this interval: around 2,700 miles were completed over 4 days on a cross...

Back at it again: 2021 Mazda 3 Hatchback (2.5L Manual) 55,600 on odo, 5,150 on Oil & Filter. Distance was covered in about 77 days, accelerated by a cross-country trip of 2,758 miles over 4 days. UOA analysis coming soon. Out: Pennzoil Ultra 0W20 + Mazda OEM Filter (Roki / Japan) In: Pennzoil...

That’s good news. The revised part has allowed my 2.5L NA to function as intended since replacement, and I’m sure it will be the same for you.

How do you like the CX-50? A great looking SUV.

I was pleasantly surprised.

Yes they do.