What is high mileage for a petrol engine?

High mileage for a petrol engine can vary depending on the make, model, and year of the vehicle, as well as driving conditions and maintenance history. However, generally speaking, high mileage for a petrol engine is considered to be around 150,000 to 200,000 miles. At this point, the engine may start to show signs of wear and tear, such as decreased fuel efficiency, increased oil consumption, and reduced performance. Regular maintenance, such as oil changes, filter replacements, and tune-ups, can help extend the life of a petrol engine and keep it running smoothly for many miles.