I have a 2009 Forester with 12,000 miles. I am old and drive it gently. I supposedly live in a "severe weather" region (Boulder CO) but that is false. Last winter here was milder than Pittsburgh and New York where I lived many years. Anyway, I brought in my car today for a 15-month maintenance. Instead of doing what the Subaru maintenance schedule lists they said I also had to change the transmission oil and have other things done for $210. I refused. They said I could void my warranty. This is a Subaru dealer. I think I am being ripped off. Would appreciate some advice.