2014 Subaru has 125,000 miles and in for an oil change. I have oil changes every 5K-7K miles. The owner’s manual says 7,500 and a coworker whom worked at a dealer (like CarMax) says 10,000 miles.
The manual says to replace spark plugs at 120,000 and have coolant exchange at 137,500 so I’m having the spark plugs replaced and doing a coolant drain and fill.
Is a fuel induction service necessary to keep the fuel injector from getting clogged or the catalytic converter from getting damaged or is the spark plugs sufficient for this task?