Oil confusion-16-19’ 2.5t

[JPL]

What gets me is these ignorant dealers actually saying you can only use conventional oil in the 2.5T. You can use synthetic in ALL cars. Nevermind that a turbo engine benefits more.

People go to a dealer for service for added expertise, particularly with your newer car. If you're dealing with this sort of ignorance, might as well just go to Joe's quicky lube.

[PTguy]

"Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 5W-30 Oil is required to achieve optimum fuel economy."

I'm so glad that Mazda requires genuine oil. I'd hate to use not-genuine oil and be found out. Is synthetic oil also genuine oil? Or do I need to be sure to use genuine synthetic oil to meet Mazda's requirements? It's so confusing.....

This image shows Mazda Original Oil. Is this also genuine oil? I'd think Mazda original oil would be really old, but it must be OK if they're still using it.

[JPL]

My owners manual suggests Castrol oils as they currently have a deal with them. So I wonder if Mazda branded oil is still being made.

[CX-5um]

What exactly is the question? As we've discussed, you can use both synthetic and conventional oil in this engine.

RTCX9 got an answer from MNAO

MNAO recommends all Skyactiv engines to use Full Synthetic Motor Oil but not required. The recommended oil MNAO does suggests is SAE 5W-30 engine oil. Mazda Genuine Oil is used in your Mazda vehicle. Mazda Genuine 5W-30 Oil is required to achieve optimum fuel economy.

Appears you can use either. Synthetic is recommended but not required. I can easily get 7-9k miles on synthetic oil on non-turbo skyativ engine. Regular oil in a turbo car would last no more than 5k imho. Interesting to see the blackstone lab results of regular oil after 5k miles.

[19CX9]

I do my own oil changes and will be using Mobil 1 oil and likely filters. I generally use better oil than what is recommended and go with the standard oil change interval which on the CX-9 is 7500 miles. For me this typically equates to 2x per year, spring and fall.

[PTguy]

In a Phoenix summer, I'd use an xW-40 gasoline engine oil. I'd want the extra viscosity in that blistering heat. Mobil 1 0W-40 or Castrol Edge or Kendall GT-1 Euro/Phillips66 Shield Euro-Tech 5W-40 would be my choice. I know, not in the book. A diesel engine 5W-40 would have the wrong additive package for our engines--it's would work but not be the best in the long run.

CX-5um, the life of oil in a turbocharged engine all depends on how the turbocharger heat is handled. To know that oil life, as you mention, a lab analysis is needed. The level of oxidation of the oil, increased by excessive heat, would be one of the signs of how the oil is surviving.

[19CX9]

In a Phoenix summer, I'd use an xW-40 gasoline engine oil. I'd want the extra viscosity in that blistering heat. Mobil 1 0W-40 or Castrol Edge or Kendall GT-1 Euro/Phillips66 Shield Euro-Tech 5W-40 would be my choice. I know, not in the book. A diesel engine 5W-40 would have the wrong additive package for our engines--it's would work but not be the best in the long run.

CX-5um, the life of oil in a turbocharged engine all depends on how the turbocharger heat is handled. To know that oil life, as you mention, a lab analysis is needed. The level of oxidation of the oil, increased by excessive heat, would be one of the signs of how the oil is surviving.

The hot Phoenix summer is one of the reasons I choose to use fully synthetic oil (turbo is another). It's the best I'm aware of that meets the manufacturer's specs. I won't go outside their specifications especially during the warranty period and probably not ever. I know that I don't know better than the people who designed the engine.

[Chris_Top_Her]

I would not use dino oil in a turbo car period. Unless it is an old engine that's been on dino its whole life, dino is more likely to come in a turbo.

[colnago1331]

I use full synthetic (Castrol Edge 5W-30) and a dealer-purchased filter/crush washer on my '17 CX-9, and I'll do a change every 5,000 miles, which for me is between 2 and 3 times/year. A 5-quart jug of Castrol Edge is only $25 on Amazon, and the filter/crush washer is maybe another $8. It seems silly to not spend $99/year to make sure my CX-9 lasts as long as possible.

[Ssteigss10]

I use full synthetic (Castrol Edge 5W-30) and a dealer-purchased filter/crush washer on my '17 CX-9, and I'll do a change every 5,000 miles, which for me is between 2 and 3 times/year. A 5-quart jug of Castrol Edge is only $25 on Amazon, and the filter/crush washer is maybe another $8. It seems silly to not spend $99/year to make sure my CX-9 lasts as long as possible.

Ill be following this schedule and oil as well! Hey colnago saw u own a Gt Coupe. Used to own an 87’ 2.3l. Loved that car!!