What maintenance is required for a Subaru at 30,000 kilometers?
2 Answers
Subaru's 30,000-kilometer maintenance items include oil and oil filter replacement, throttle valve cleaning, etc. Oil and oil filter replacement are mandatory items: Due to the harsh high-temperature and high-pressure environment inside the engine, the shelf life of oil is significantly shortened, and its performance greatly declines. Over time, it fails to protect the engine. The oil filter prevents impurities from mixing into the oil, which can cause oxidation, leading to the formation of sludge and clogging the oil passages. Both the oil and oil filter should be replaced simultaneously. The air filter should be replaced every 10,000-15,000 kilometers, and the fuel filter every 30,000 kilometers. Throttle valve cleaning is necessary: However, it is unnecessary before reaching 30,000 kilometers and can be declined. By 30,000 kilometers, the vehicle has been driven for a considerable period, and the throttle valve may accumulate significant carbon deposits, causing the throttle opening to become smaller. This can lead to unstable idling and sluggish acceleration.
Last month, I just had the 30,000-kilometer maintenance done on my Forester. Changing the engine oil and oil filter was definitely necessary. The 4S shop also replaced the cabin air filter and engine air filter, saying these two parts get dirty especially easily in coastal areas. They also tested the brake fluid for water content, and fortunately, it hadn’t reached the replacement standard yet. What surprised me the most was that they checked the condition of the piston rings in the horizontally opposed engine, noting that this type of engine requires special attention to carbon buildup—luckily, I’ve been using full synthetic oil all along. The all-wheel-drive system also underwent a comprehensive inspection, and the gear oil in the front and rear differentials was still in good condition. After the maintenance, the technician reminded me to pay attention to tire rotation, mentioning that Subarus are prone to uneven wear on the left and right sides.
