2022 Mazda CX-9 - HPL PCMO 10W-20 - 7,211 Miles

Joined
Mar 8, 2012
Messages
16,262
Location
Colorado Springs
No doubt it is excellent oil.
I did not follow this engine closely, only stumbling here and there, so that is why I did not catch that fuel dilution issue.
Considering winter temperatures, I wonder how their 5W20 would do or even 5W30, regardless that you get some hit on grade retention. I would run some of their Euro 5W30 stock.
 
Joined
Aug 8, 2022
Messages
26
No doubt it is excellent oil.
I did not follow this engine closely, only stumbling here and there, so that is why I did not catch that fuel dilution issue.
Considering winter temperatures, I wonder how their 5W20 would do or even 5W30, regardless that you get some hit on grade retention. I would run some of their Euro 5W30 stock.
The CCS will be the limiting factor for cold operation - and while it can get below 0 on occasion here - in the 3 years I've been here, haven't seen it yet! IF that happens - I'll park in the garage next to the apartment - where it will be significantly warmer due to heat from the building. MRV Viscosity is actually better than a lot of the 5W-30's it competes with! So it will pump if the starter will crank it over!

Edit: If anyone here knows the answer - how would fuel dilution affect CCS? Will it improve CCS? Will it hurt CCS? What exactly will happen?
 
Joined
Mar 8, 2012
Messages
16,262
Location
Colorado Springs
The CCS will be the limiting factor for cold operation - and while it can get below 0 on occasion here - in the 3 years I've been here, haven't seen it yet! IF that happens - I'll park in the garage next to the apartment - where it will be significantly warmer due to heat from the building. MRV Viscosity is actually better than a lot of the 5W-30's it competes with! So it will pump if the starter will crank it over!

Edit: If anyone here knows the answer - how would fuel dilution affect CCS? Will it improve CCS? Will it hurt CCS? What exactly will happen?
I started 10W40 oil, and as I remember, it was Statoil in the sump at -42c. Though, the camshaft was not happy about it :)
 
Joined
Apr 1, 2008
Messages
3,730
Location
Iowa
We have a 2018 CX-9 AWD and really like it. We're at 48k miles and it rides beautifully and the motor I find pretty enjoyable. Mileage at 100% city is usually around 19-20 and have seen above 28 on the highway. I would like to service the trans as well as the diff/tcase soon but if I don't get to it soon it will be in the spring.

The report looks good, wishing you many years of reliable service 👍
 
Joined
Nov 27, 2017
Messages
581
Location
USA
The CCS will be the limiting factor for cold operation - and while it can get below 0 on occasion here - in the 3 years I've been here, haven't seen it yet! IF that happens - I'll park in the garage next to the apartment - where it will be significantly warmer due to heat from the building. MRV Viscosity is actually better than a lot of the 5W-30's it competes with! So it will pump if the starter will crank it over!

Edit: If anyone here knows the answer - how would fuel dilution affect CCS? Will it improve CCS? Will it hurt CCS? What exactly will happen?
Fuel dilution will impact CCS in a positive way.
 
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