I sent in the factory fill 0w-20 for UOA even though it was of dubious utility see https://bobistheoilguy.com/forums/t...a-mx-5-factory-fill-0w-20-2-873-miles.364458/ , that UOA reported unusually high copper levels.
Even though I knew logically the factory fill could show funky results it still raised my paranoia. Hence the dubious utility of sending in the factory fill often stated here. I have since found several Mazda motors report high copper levels at the beginning and then tapering off. Here in this second drain this motor appears to be on that healthy trend.
Aluminum is up but still near the universal averages. I guess I can't really complain about that. Iron is down to the universal average. I will take this is as a decent report for a fresh motor overall.
Not only is the type of oil different between these two UOA's but also my driving style. Throughout 2022 on the factory fill I was doing low speed very short commutes where the motor barely came up to temp, I did try to do some longer weekend drives at least once a month but it took 9 months to rack up 2,800 miles. I considered the main threat to be fuel and water contamination. Hence the rudimentary Kirkland oil. its a good oil graded against its very low cost, Idea was to dump it at 3k miles or so about every year.
But then in March I got a new job 4 hours away from home, I now have a long weekly freeway commute (2,800-3,500 rpm for hours at a time) across a big chunk of Texas and the miles are racking up much faster, I am starting to re-think my oil selection and may need something more substantial and to use it for more miles so I don't spend my limited free time changing oil.
This motor is easy on oil, only real concern is intake valve deposits due to direct injection, partially the reason I moved to 5w-30 for its lower volatility, the other reason is our hot local climate.
I asked Blackstone what the source of the copper might be, possibly bearings or an oil cooler or alike. hence their reply.
Even though I knew logically the factory fill could show funky results it still raised my paranoia. Hence the dubious utility of sending in the factory fill often stated here. I have since found several Mazda motors report high copper levels at the beginning and then tapering off. Here in this second drain this motor appears to be on that healthy trend.
Aluminum is up but still near the universal averages. I guess I can't really complain about that. Iron is down to the universal average. I will take this is as a decent report for a fresh motor overall.
Not only is the type of oil different between these two UOA's but also my driving style. Throughout 2022 on the factory fill I was doing low speed very short commutes where the motor barely came up to temp, I did try to do some longer weekend drives at least once a month but it took 9 months to rack up 2,800 miles. I considered the main threat to be fuel and water contamination. Hence the rudimentary Kirkland oil. its a good oil graded against its very low cost, Idea was to dump it at 3k miles or so about every year.
But then in March I got a new job 4 hours away from home, I now have a long weekly freeway commute (2,800-3,500 rpm for hours at a time) across a big chunk of Texas and the miles are racking up much faster, I am starting to re-think my oil selection and may need something more substantial and to use it for more miles so I don't spend my limited free time changing oil.
This motor is easy on oil, only real concern is intake valve deposits due to direct injection, partially the reason I moved to 5w-30 for its lower volatility, the other reason is our hot local climate.
I asked Blackstone what the source of the copper might be, possibly bearings or an oil cooler or alike. hence their reply.
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