We have a 2015 Subaru Outback 2.5i, at 72,000 have been told by dealer short engine block needs to be replaced due to engine sludge & caking. Have been told this is due to not changing oil often enough. We’re missing a few receipts (one garage we used has closed, can’t get receipts reprinted), but had oil changes every 6-12,000 miles. Never had low or v dirty oil on dipstick, never had oil light on.
First sign of trouble at 57K, all dash lights on, error codes re: cam shaft & timing, & dealer said oil found v low & dirty, flushed x 2 & changed. 9 months later, same lights & codes, oil changed (diff’t mechanic), brought to dealer for timing belt noise other mechanic heard & had pulled same codes. Dealer wouldn’t investigate further. 10 months later, same lights & codes, dealer changed oil & said fixed - but I pushed since 3rd time same lights & codes, THEN they investigated further, after ~3 weeks came up with offer to replace short block but only pay 1/2, leaving us with $3K cost.
- does it sound like correct diagnosis, & entire problem due to us changing oil less than perfect every 6K mi?
- is replacing only short block a smart idea (other parts could be damaged, rest of car out of warranty); would rebuilt or junkyard engine by other mechanic be reasonable to look into?
- given problem 1st showed up while under warranty, is offer of Subaru to pay only 50% reasonable?
Look forward to thoughts of others, esp. if you’ve had similar experience.