2017 Subaru Outback 4 cylinder 55,000 miles
Oil changed 3,000 miles ago, level was perfect. Coolant level right at full also.
Have been noticing about 10% loss in fuel economy and power.
I checked my oil and it was much darker that usual after 3,000 miles, and it was 1/2 quart low.
Coolant was 1/2 quart low also.
Would these be common symptoms of a head gasket starting to leak?
Would these be common symptoms of a head gasket starting to leak?
Could be, though those engines are not prone to blowing head gaskets unless they've been overheated.
I would check for coolant leaks, oil leaks, and do a head gasket test. (Note you need different UV dyes to use in coolant and oil.)
https://www.youtube.com/watch?v=rDuGeQnMOzk
https://www.youtube.com/watch?v=LYzTyTlnsr8
https://www.youtube.com/watch?v=v0U8Iyf0kk4
