In regards to the mileage question... On a 2015 4Runner it took a change at 700 miles and another at 1,500 miles to get rid of the visible glitter in the oil. Factory filter used each change. Professional engine builders dump the first run oil fairly quickly to rid these shavings, but those are non OEM applications where they don't have to worry about environmental tax credits, and each engine will be slightly different in how much wear-in shavings are produced. OEM manuals recommend easy driving for X amount of miles for break-in and due to oil conservation initiatives/guidelines they would never recommend in this day and age that oil be dumped early. Modern engines do not use any break-in oil from the factory, it is bulk contract oil.I've always been a normal OCI from 0 miles and had several vehicles purchased new for 10+ years/over 200K (one of them) with no issues, excessive oil consumption, etc. It's a leftover thing from "the old days" and no longer necessary. This makes people feel good and if that's the case, you aren't hurting anything and by all means, it's your time/money/sleeping well at night. I always want to know though...so say 1.5K...why not 1.2K? or how about 500 miles? How does one determine when "all the metal shavings" (that are in the oil filter BTW and not continuously floating around) are all gone? Folks will often say in these threads "I do XYZ special oil change regimen on all my new cars they go ABC miles!" but consider there are likely many more folks that "just do my normal OCI from day one and my cars all go the same ABC miles". It's all feel good, nothing more in 2023 to do this.
The "shavings" are handled by the filter. So I'm still not clear on why this is an issue to just go 5K or whatever? If the shaving are a concern, I'd change it in the first 20 miles when most of that happens.In regards to the mileage question... On a 2015 4Runner it took a change at 700 miles and another at 1,500 miles to get rid of the visible glitter in the oil. Factory filter used each change. Professional engine builders dump the first run oil fairly quickly to rid these shavings, but those are non OEM applications where they don't have to worry about environmental tax credits, and each engine will be slightly different in how much wear-in shavings are produced. OEM manuals recommend easy driving for X amount of miles for break-in and due to oil conservation initiatives/guidelines they would never recommend in this day and age that oil be dumped early. Modern engines do not use any break-in oil from the factory, it is bulk contract oil.
The manual states to perform the first oil change at 7,500 miles.
I'm wondering if changing it much sooner, say at 1,000 miles
and using a high ZDDP break-in oil would be beneficial? If I did do this would it be detrimental or just a waste of money?
The "shavings" are handled by the filter. So I'm still not clear on why this is an issue to just go 5K or whatever? If the shaving are a concern, I'd change it in the first 20 miles when most of that happens.
Except that most of it doesn't happen in the first 20 miles. Hard evidence that it doesn't upon inspecting many break-in runs. Where did you get that?
If you have "shavings' In your oil left behind from the block decking flycutter and mains cap align-boringNo need for break-in oil. On oem engine assembly lines a robotic arm will normally dispense a small amount of regular oil on the journals, nothing special. It is definitely a good idea to give an initial oil change at about 1k miles or so, the amount of break-in shavings can be significant, to the point where you will easily see them reflect in the drain bucket under sunlight.
After the shavings run through the oil pump and then rest of the engine when the oil filter bypass opens on start up and rapid wot runs.The "shavings" are handled by the filter. So I'm still not clear on why this is an issue to just go 5K or whatever? If the shaving are a concern, I'd change it in the first 20 miles when most of that happens.
Just like the ones that did that before the first early oil change.After the shavings run through the oil pump and then rest of the engine when the oil filter bypass opens on start up and rapid wot runs.
No.LAST UPDATE TO THE QUESTION!!
I wonder if draining the OEM oil and replacing the filter ASAP to get rid of any metal shavings and then adding good oil and the Redline break-in additive would be beneficial in the long run.
"Professional Engine Builders" and that is in quotes for the exact reason everyone's Uncle thinks they are one.In regards to the mileage question... On a 2015 4Runner it took a change at 700 miles and another at 1,500 miles to get rid of the visible glitter in the oil. Factory filter used each change. Professional engine builders dump the first run oil fairly quickly to rid these shavings, but those are non OEM applications where they don't have to worry about environmental tax credits, and each engine will be slightly different in how much wear-in shavings are produced. OEM manuals recommend easy driving for X amount of miles for break-in and due to oil conservation initiatives/guidelines they would never recommend in this day and age that oil be dumped early. Modern engines do not use any break-in oil from the factory, it is bulk contract oil.
No...no it's not.No need for break-in oil. On oem engine assembly lines a robotic arm will normally dispense a small amount of regular oil on the journals, nothing special. It is definitely a good idea to give an initial oil change at about 1k miles or so, the amount of break-in shavings can be significant, to the point where you will easily see them reflect in the drain bucket under sunlight.