Most minor, single mouth ulcers are caused by damage to the mouth, for example by accidentally biting the inside of your cheek while eating, or from a sharp tooth, food or filling.
I have a 2005 Honda Element. The owners manual states the brake fluid should be replaced every 3 years. When I asked the dealer to replace the brake fluid, they said it was going to cost $190. I told them last time they did it, it was only $27.
How often do you need to change differential fluid and break fluid? (self.subaru) submitted 2 years ago * by hamsterdamster. I was just at the dealer for my 80 dollar oil change (which is ridiculously overpriced, but I was told that if I get it done anywhere else or do it myself, I void the warranty). I'm at 30,000 miles and the guy told me that I needed 600 dollars worth of work done.