RACE Warns Drivers: Why You Should Idle Your Engine Before Turning It Off
The Royal Automobile Club of Spain warns that turning off your engine immediately after a long drive can damage your turbocharger, recommending a 30-to-60-second idle period to allow for gradual cooling.
As summer road trips become more frequent, the Royal Automobile Club of Spain (RACE) is warning drivers about a common habit that can cause serious engine damage. Turning off your engine immediately after a long drive can lead to the premature failure of your turbocharger—a vital part of modern engine performance.
A turbocharger relies on a constant flow of oil to stay lubricated and cool. When you switch off the ignition abruptly, the oil pump stops working, leaving the turbo without circulation while it is still extremely hot. This causes the oil to break down and leave behind carbon deposits, which significantly speeds up mechanical wear.
To prevent this, experts recommend a simple routine: let your engine idle for 30 to 60 seconds before turning it off. This allows the oil to keep circulating, helping the turbo cool down gradually. Driving more gently during the final few kilometers of your trip also helps the system reach a safer temperature before you park.
Following this advice can save you a significant amount of money. Replacing or repairing a turbo typically costs between 800 and 1,500 euros, and can climb as high as 3,000 euros for luxury vehicles. If you notice any unusual behavior from your car, RACE advises visiting a mechanic immediately. Driving with a faulty turbo not only risks further damage to your engine but can also be a serious safety hazard on the road.