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.
When to Change Transmission Fluid If you ask around, youâll often get different opinions on when to change transmission fluid. Some car manufacturers recommend getting a fluid change every 100,000 or even 150,000 miles, but that is far too long when you think about it.