Quick answer
Oil additives don’t typically cause sludge when used correctly. However, overuse, incorrect formulations, or mixing incompatible additives can lead to buildup.
Detailed answer
Many modern additives contain detergents and dispersants to help prevent sludge. However, if you use too much of an oil thickener or incompatible products, you risk creating deposits that clog oil passages. Following the manufacturer’s recommended dosage and choosing high-quality additives designed for your oil type will prevent these issues and keep your engine clean.
