Turbo timers are aftermarket devices that allow your engine to idle for a set time after you turn off the ignition. In theory, this extra idling helps cool down the turbocharger before shutting down the engine oil flow.

Subaru Says No Need for Turbo Timers

According to Subaru's official technical documents, turbo timers are not necessary for their modern turbocharged engines (2002 and later). Here's why:

• Improved cooling systems: Newer Subaru engines have better cooling capacity, allowing the turbo to cool down effectively even after engine shutoff.
• Coolant circulation: Even after the engine stops, hot coolant continues to circulate through the turbocharger, aiding in the cooling process.

So, are Turbo Timers Useless?

Not entirely. Here are some situations where they might be helpful:

• Cold weather warmup: Set the timer to pre-warm your car on a cold day before you get in.
• Convenience: Avoid the hassle of remote starters, especially for manual transmission cars.

Things to Consider Before Getting a Turbo Timer

• Gas mileage: The extra idling time can slightly reduce gas mileage.
• Installation: While achievable, installation can take 1-2 hours.
• Potential downsides: Although uncommon, faulty timers can cause electrical problems.

Overall

Turbo timers are not necessary for modern Subaru turbos. However, they can offer some convenience features for specific situations. Consider your needs and weigh the pros and cons before deciding.