Best Answer: People have always argued what the best oil out there is. And most people either go for royal purple, castrol, and mobil 1. I personally choose Mobil 1, but the choice is really opinion based.
The sores may occur singly or in groups and vary from about 1/8 inch to 1 -1/4 inch in diameter. The sore may be painful for three or four days, but complete healing usually takes ten to fifteen days. Canker sores may recur many times each year. Causes: No one knows what causes canker sores. They may be caused by a virus, may be a form of allergic reaction or may result from an auto-immune condition (meaning that the body has developed an immune reaction against its own tissue).
Stress/Injury. Any stress or injury located inside your mouth may be the root cause of a canker sore formation. Anything from brushing too hard, biting your gums, harsh mouthwashes, or eating something that causes bruising can lead to the tiny ulcers.If you are susceptible to canker sores, also try avoiding toothpastes and mouthwashes that contain sodium lauryl sulfate.nything from brushing too hard, biting your gums, harsh mouthwashes, or eating something that causes bruising can lead to the tiny ulcers. If you are susceptible to canker sores, also try avoiding toothpastes and mouthwashes that contain sodium lauryl sulfate.