At 88k miles, Blackstone report suddenly shows 10x normal level of Sodium and nearly 100x Potassium - clearly, coolant in oil. I have searched the internet and cannot find any other mention of this situation in the 2.5 SkyActive engine. Of course, with 13:1 compression the first suspect is the head gasket. However, there are no bubbles emanating from the radiator and the chemical (block) test shows no evidence of combustion gases in the coolant. The next thought for any engine would be the oil cooler, but this engine doesn't have one. I'm familiar with the water pump issues from (completely different, Ford-sourced) Mazda engines but the exploded view in TSB01-022/19 (https://static.nhtsa.gov/odi/tsbs/2019/MC-10169537-0001.pdf) seems to make this pump an unlikely source for transfer into oil.
Does anyone have experience with this situation, in this engine?
Since many are probably wondering....no expense has been spared in the care of this engine - always 89 Octane to mitigate possible detonation and 5k oil changes (not every one analyzed) with LiquiMoly SpecialTecAA 5w30. Spark plugs replaced at 71k.
Blackstone report shows no damage yet, but I'm keenly aware of the seriousness of this condition. I've already changed the oil again after only 2600 miles and sent that for analysis also. Credit to Blackstone for saving this engine!
It may well still be the head gasket, but I'm looking for something more definitive before I spend that $ unnecessarily.
What say you, Mazda Gurus??
Blackstone report:
https://www.mazdas247.com/forum/ind...iv-oil-analysis-thread.123854237/post-6716760
*Congratulations, Team Mazda! -- 3rd Place DPi Class (and overall) 2021 24 Hours of Daytona
Does anyone have experience with this situation, in this engine?
Since many are probably wondering....no expense has been spared in the care of this engine - always 89 Octane to mitigate possible detonation and 5k oil changes (not every one analyzed) with LiquiMoly SpecialTecAA 5w30. Spark plugs replaced at 71k.
Blackstone report shows no damage yet, but I'm keenly aware of the seriousness of this condition. I've already changed the oil again after only 2600 miles and sent that for analysis also. Credit to Blackstone for saving this engine!
It may well still be the head gasket, but I'm looking for something more definitive before I spend that $ unnecessarily.
What say you, Mazda Gurus??
Blackstone report:
https://www.mazdas247.com/forum/ind...iv-oil-analysis-thread.123854237/post-6716760
*Congratulations, Team Mazda! -- 3rd Place DPi Class (and overall) 2021 24 Hours of Daytona