How long should the engine run if the car hasn't been driven for a long time?
3 Answers
If the car hasn't been driven for a long time, the engine should run for about 10 minutes. It's recommended to start the car once a week and let it idle for 10 minutes to keep all parts moving and prevent rust, which is beneficial for the vehicle. Even when parked and unused, the car battery will self-discharge. Prolonged inactivity may lead to sulfide formation on the battery surface, affecting charging efficiency, and in extreme cases, could cause complete battery failure. Drivers can occasionally take the car for a short drive to extend battery life, which not only facilitates faster charging but also reduces wear on chassis components.
When I was on a three-month business trip up north and didn't drive my car, I specifically consulted a friend at the repair shop before starting it upon my return. He recommended idling for at least ten to fifteen minutes, mainly to recharge the battery, as it naturally discharges when parked for long periods. Additionally, the engine oil inside has all drained back to the oil pan and needs time to recirculate and lubricate. I always start the engine and wait ten minutes before driving off, taking the opportunity to check the tire pressure and whether the brake pads are sticking. If the temperature is below freezing, it's best to extend this by another five minutes to allow the antifreeze to fully circulate. Sudden long-distance driving after prolonged parking can easily damage the car, so it's advisable to drive a few kilometers at low speed first to warm it up.
We have an old Camry at home that often sits idle for half a year at a time. Every time I start it, I make a habit of waiting eight to twelve minutes. Two years ago, I once drove off after only three minutes of idling, and it stalled midway and blew a fuse. The mechanic said the battery needs more than five minutes to replenish the charge consumed during startup, and the engine also needs time to build up oil pressure. Nowadays, I use this time to clean the fallen leaves off the windshield and listen to whether the engine sounds smooth. If I smell gasoline or see blue smoke from the exhaust pipe, I shut it off immediately, as this could indicate aging fuel line seals. If the car has been parked for more than three months, remember to check the oil level in advance.
