You can add 12 oz Prolong Engine Treatment at any time. Then each oil change thereafter add 8 oz Booster. Also, you can add the 8 oz Transmission treatment to your tranny any time.
How often should I use Prolong Engine Treatment? First install the 12 oz. Engine Treatment, which may be done at any time. It is recommended that the Booster volume be added with each oil change, or at least every 6,000...
What is the "Booster"? The 8-oz. Prolong Engine Treatment Booster is the same formula as the 12-oz. Prolong Engine Treatment, and is packaged for repeat use after the first application of the...