9.5 accord 2.0 accelerator carbon deposit problem.

Carbon deposition is related to oil products, but not all oil products. Your car habits are also very important, and there is the engine. Direct injection in cylinder is easier to deposit carbon. Frustration should have little to do with oil. When the engine oil reaches its service life, it will have a sense of attenuation. I can't explain the problem of depression, because I am also depressed.