This is a question I threw out on BITOG with little response.
I completed a clean and rinse cycle on my '02 Volvo S60 (Old Instructions) approx. 15K miles ago. Is it too late to start utilizing a MD? Do I need to do another clean/rinse phase?
Your fine. Start your Maintenance Rrogram. Read below.
Why the Maintenance Dose?
You have just finished with a cleaning and rinse applications, to clean up the motors internals with respect to harmful deposits, but you are really stopping at third base. Early on with Auto-Rx we had suggested running a clean and rinse cycle every 25,000 miles to keep a motor deposit free. Over the last 3 years we have realized that it is more effective to run a smaller dose of Auto-Rx with each oil change.
In addition to keeping your motors vital internals clean, Auto-Rx has shown to reduce wear, as well as providing for a lower coefficient of friction than that of motor oil alone. With just three fluid ounces in the sump, enhanced lubrication is provided as well fuel efficiency. So why wait utilizing the Auto-Rx benefits every 25,000 miles, when you can have it working every time you turn the key.
The maintenance dose has shown excellent results through used oil analysis, with both conventional oil runs and full synthetic oil, with extended drains.
You should religiously use the maintenance dose, with each oil change. You will likely maintain the cleasing gains derived from the initial cleaning and rinse, provided that you have been running proper oil change intervals since.
