Yes. Essentially, the mistake people make is that they put an additive in along with an oil change; the additive breaks loose carbon and crud, then dumps it right into the fresh oil. Putting the additive in before an oil change, allowing it to do its job, then changing the oil after the contaminants have been loosened and trapped, is the best approach.geomax said:Best rule of thumb is to use it right before an oil change.
Uh, hang on…geomax said:There was a post I read by a guy who advocated changing gasoline brands every 5000 miles. I don't recall where I read it.