The Lubrication Specialties Hot Shot's Secret TBN Booster(Fortified Oil Stabilizer) is a detergent package that already exists within the properties of the base oil. As oil works, its TBN (Total Base Number) starts to fall and oil will begin to sheer, eventually leading to wear and sludge inside the engine. Hot Shot’s Secret TBN Booster is a fortified oil stabilizer that will increase an oil’s TBN by up to seven points, and instantly bring it back into the CK-4 spec. Monitoring TBN with an oil analysis allows users to safely extend oil drain intervals. TBN Booster is also infused with the brand's patented FR3 nano lubricant to provide greater level of protection with each treatment, the company says.