How long do spark plugs last in a Subaru Outback?

Spark Plug Lifespan in a Subaru Outback
In a Subaru Outback, the lifespan of spark plugs is typically recommended to be around 60,000 miles. However, it’s worth noting that the actual lifespan of spark plugs can vary based on factors such as the type of spark plugs used and the specific driving conditions. The factory spark plugs in a Subaru Outback are half iridium, with a platinum tip on the ground electrode. NGK, a manufacturer of spark plugs, states that the expected lifetime for the platinum/iridium hybrid plug is 80-100k miles, while Subaru rates them more conservatively at 60k miles.
It’s also mentioned that there are double iridium plugs available that should last longer, and an NGK engineer stated that these plugs will outlast most engines, laughing at the change interval suggested by OE’s.
Some forum members have reported delaying the spark plug replacement until 80,000 or 100,000 miles. Additionally, it’s important to consider the specific recommendations in the vehicle’s owner’s manual and to take into account the driving habits and conditions when determining the appropriate interval for spark plug replacement.
In summary, while the recommended interval for spark plug replacement in a Subaru Outback is 60,000 miles, the actual lifespan can vary based on factors such as the type of spark plugs used and driving conditions.
If you have any further questions, feel free to ask!

How long do Subaru OEM spark plugs last?

Modern SUBARU BOXER® engines require improved spark plugs made with material like platinum. This means you’ll only have to worry about changing them every 60,000 miles or so.

Why are Subaru spark plugs so expensive?

Because of the cost of iridium, the electrode is thinner, but they still deliver better power, better combustion and longer life than other plugs.

How long do Subaru spark plugs last?

Modern SUBARU BOXER® engines require improved spark plugs made with material like platinum. This means you’ll only have to worry about changing them every 60,000 miles or so.

What brand of spark plugs does Subaru use?

SPARK PLUG & HIGH TENSION CORD
NGK:SILFR6A. NGK:SILFR6A.

Is it hard to replace spark plugs on Subaru?

Last night when I changed them I realized how to do it. 2 screws take your windshield washer fluid reservoir off on the drivers side, one bolt takes the air box off on the passenger side. From there it’s a straight shot to pull the plugs, no joints needed. Plugs changed in 15 minutes, hood open to close.

How many miles do factory spark plugs last?

100,000
How long spark plugs last varies by manufacturer and vehicle, but on many vehicles today, they should be good for 100,000 or more miles. Some vehicles, though, will have shorter intervals, particularly performance and luxury models.

How much does it cost to replace spark plugs in a Subaru Outback?

The average cost for Subaru Outback Spark Plugs Replacement is $310.

When should I replace my Subaru Outback spark plugs?

30,000 Miles or 36 Months.

What happens if I don’t replace spark plugs?

The deposits that build up on the plugs can eventually cause them to misfire. When this happens, the unburned fuel in the cylinders can start to eat away at the cylinder walls. This can cause dangerous pressure levels to build up, and it can even lead to engine failure.

How do I know when my spark plugs need replacing?

5 Signs You Need New Spark Plugs

1. Engine Misfires. A misfiring engine is a big sign that one or more of your spark plugs are not firing properly.
2. Poor Gas Mileage. When spark plugs are working correctly, they burn fuel efficiently in your engine.
3. Trouble Starting.
4. Slow Acceleration.
5. Rough Idling.