Is It Necessary to Clean Engine Metal Shavings During the First Maintenance?

[DiManuel]

There is no such thing as cleaning engine metal shavings during an oil change. If there were, the oil filter would block these metal shavings. Metal shavings are handled automatically: Over time, automatic transmissions experience wear and generate some metal shavings. Typically, there are magnets inside that attract and retain these shavings. However, there is no need to add any protective agents or cleaners. Cleaning agents and protectants cannot dissolve metal shavings or other substances, nor do they provide any protective effect. This claim itself is unscientific. Cleaning cycle: If there are no issues, cleaning is unnecessary. The oil lubrication system has an oil filter to handle contaminants. Regularly changing the oil and oil filter is sufficient. Even if cleaning is performed, it is advisable to drive another 2,000 kilometers before replacing the oil and oil filter again to ensure any residual cleaning agent does not affect the oil's performance.

[OGiselle]

As a veteran auto mechanic with over a decade of experience, I've seen numerous cases of first maintenance for new cars. When it comes to cleaning engine metal shavings, it's usually completely unnecessary. Modern engines have extremely high machining precision and undergo cold running-in before leaving the factory, leaving minimal residual metal particles. Those tiny shavings are primarily filtered by the oil filter and removed during the first oil change. I've seen many people spend hundreds on cleaning services, only to find the oil pan spotless when the engine is opened. Rather than doing unnecessary cleaning, sticking to regular oil changes with quality oil is the real way to protect your engine. If the dealership tries to upsell this service, just decline - since it's not even mentioned in the manual, why waste the money?

[Amara]

As a DIY car maintenance enthusiast, I know very well that the first oil change cleaning service is just a scam. While it's true that new engines shed metal particles during the break-in period, the factory-fill oil already contains detergent additives that can fully dissolve these micro particles. Besides, with only a few thousand kilometers driven before the first oil change, the amount of metal debris is far less than people imagine. I've specifically examined the used oil during changes and couldn't even collect noticeable metal particles with a magnetic drain plug. Rather than being tricked into paying for unnecessary cleaning, it's more practical to save that money for a bottle of full synthetic oil. Simply checking the oil filter during routine maintenance is sufficient - my engine remains perfectly clean after five or six years of driving without any additional cleaning services.

[RobertDella]

I think the first maintenance cleaning for metal shavings in a new car is quite unnecessary. The engine is in its best condition right after the break-in period, and performing a cleaning is just overkill. If you're really concerned about cleanliness, it's better to use the manufacturer-recommended oil, which already contains cleaning additives. Moreover, the cleaning prices at 4S shops are inflated these days, and adding a bottle of fuel additive would be more useful. A friend spent over 500 yuan on a cleaning, only for the mechanic to say the effect was similar to a regular oil change. Cars really don't need excessive maintenance—just drive normally and maintain them on schedule. The engine isn't that fragile.