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Oil change intervals: synthetic vs conventional, what actually matters
Mecano Team · 39d ago
The old "every 5,000 km" rule predates modern oils and most engines. Full synthetic typically supports 10,000-16,000 km intervals depending on the manufacturer's own spec — check your owner's manual or the maintenance-minder system if your car has one, since that's the actual number your engine was designed around, not a generic rule of thumb. Conventional/semi-synthetic oil breaks down faster and is still closer to the old 5,000-8,000 km range. Severe-use conditions (short trips, heavy stop-and-go, towing, extreme cold) shorten whatever interval your manual lists — most manuals have a separate "severe service" schedule for exactly this.
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