If the car leaks oil avoid using synthetic. It penetrates the gaskets better than regular oil and will make the leak worse. I use it in my truck to extend the drain intervals. I typically get 15,000km between changes. Its better for vehicles using turbo chargers. When you shut down the motor while the exhaust is still hot, the oil in the turbo bearing will coke potentially causing premature turbo failure. Synthetic is resistant to burning up compared to conventional dino.
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