Hello! I did a full drain and fill at 1,202 miles on my 2023 Mazda CX-5 2.5 Turbo and sent a sample off to Oil Analyzers. My concerns were confirmed: you should not wait 7,500 or even 5,000 miles for your first oil change. Here’s my oil analysis at only 1,202 miles.

From left to right: old oil sample, new oil, new filter, factory filter

1,202 mile oil analysis

Iron: 15
Aluminum: 4
Copper: 43
Silicon: 58
Fuel Dilution: 4%
Viscosity @ 100°C: 8.5 cSt
Base No: 5.19

This supports the notion that you want to get initial wear metals and assembly silicon out of your engine early to reduce unnecessary wear. The fuel dilution isn’t great, either. I expect these results to sharply improve in the next two oil changes as parts wear-in and the piston rings achieve a better seal to reduce fuel contamination, which had already compromised my 5W-30 oil and reduced its viscosity closer to that of a 0W-20. Of course it could have started out on the thinner side for fuel economy as well.

Fumoto Valve

I also took the opportunity to install a Fumoto valve to make this process much easier going forward. Questions and comments welcome.

  • ChromatischismOPB
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    11 months ago

    I did change the filter to the one in the picture. That is the PN for the turbo model.

    I’ll do a yearly change. That will be roughly 5k miles.

    For the rest of the car, that is years away. I’ll follow the schedule for the most part with the exception of the transmission. I feel it should get a change around 40-50k. Maybe at the same time as the spark plugs.