My extended warranty lasted be a little bit less than a year on the 60,000 mile plan with my ridiculous commute. I wish I had chosen the longer one, because I had been a bit too naughty with my 5-speed manual Crosstrek.
If you're your own mechanic, and I'm not trying to scare you, but I'd like to share with you a few suggestions...
1) If this is your first Subaru, rely primarlily on OEM oil filters only, or filters that legitimately meet the OEM specs.
There is an abundance of engine oils that meet the specs outlined in the owner's manual, but oil filters that meet Subaru's unusually high bypass valve spec are few.
Some of the ones I know that meet the spec are (but this list is not complete)
- Subaru blue OEM (manufactured by Honeywell/FRAM)
- Subaru black OEM (manufactured by Tokyo Roki, highly sought after)
- Six star brand (Canadian OEM, manufactured by Northeast Imported Parts)
- Purolator oil filters
- certain Wix oil filters
- pink STI (Subaru Tecnica International, prohibitively expensive, used by motorsport teams especially Subaru factory rally and race teams)
2) Monitor your tire pressures religiously.
Check them only when cold. Subaru defines cold tires as being driven less than 1 mile and having sat for more than 3 hours.
The owner's manual calls for a monthly checkup. I go a step further and check all four drive tires once a week. I check the spare tire once a month, in line with the owner's manual recommendation.
I go the extra step and ensure the tires are uniformly exposed or shielded from sunlight and the vehicle set at a level surface such as a garage.
The reason why I preach this is because the lack of tire maintenance on my first Subaru resulted in a failing center differential and a driveline that was basically ready for the junkyard. To err on the side of caution considering you too drive an exceptionally high amount of miles per week compared to average commuters, periodically check your tire wear patterns and inspect the suspension alignment angles. A bad alignment can snowball from a slight inconvenience, to unevenly worn tires, to eventual driveline component damage.
Oh, and I'd recommend running the specified tire pressures on your tire placard at the driver doorjamb. If you're adamant on running higher pressures, I'd advise to use the same front-to-rear proportion of pressure as the specified pressures on the placard.
3) If you haven't already (I would be concerned if you don't do this already), do a pre-drive inspection every day before you begin driving to the letter according to the owner's manual, as well as inspections during fuel stops.
For my 5-speed manual 2014 Crosstrek, I put this on my sunvisor's map hold as a reminder:
In addition, checking all fluids according to the owner's manual is something that should be done during every fuel up.
Like I said, #3 should be something you're already doing. If not, I'd recommend you get in the habit of doing.
If you too have any suggestions on such preventive maintenance checks and services, I'd like you to share considering I too still have a bit of high mileage mega-commuting to go.