What kind of oil do you use for a car that has over 100000 miles on it?

For a car with over 100,000 miles, it's important to use a high-quality synthetic oil that meets the manufacturer's specifications. Synthetic oils are more stable than conventional oils and can withstand higher temperatures, which is beneficial for engines with higher mileage. They also contain fewer impurities, which can help reduce engine wear. Additionally, synthetic oils can improve fuel economy and reduce emissions, making them a good choice for older vehicles.

Here are a few things to consider when choosing an oil for a high-mileage car:

* Viscosity: The viscosity of an oil refers to its thickness. For a car with over 100,000 miles, it's recommended to use a slightly thicker oil, such as a 10W-30 or 10W-40, to provide better protection against engine wear.

* Additives: Look for an oil that contains additives that are specifically designed for high-mileage engines. These additives can help reduce wear and tear, improve engine performance, and extend the life of the engine.

* Brand: Choose a reputable brand of oil that meets or exceeds the manufacturer's specifications. Some popular brands include Mobil 1, Castrol GTX, and Valvoline.

It's also important to change the oil and oil filter according to the manufacturer's recommendations, as this will help keep the engine in good condition and prevent premature wear.