The Slick 50 Engine Treatment is a unique chemical support package that helps bond PTFE to the metal parts of your engine, resulting in smoother, lower friction, and lower wear surfaces. This treatment can be added directly to your engine oil for engines up to 1400cc. It is suitable against friction and heat over successive oil changes, during tough stop-go driving, high temperature, and high stress conditions. The dispersant keeps the engine clean by preventing sludge build-up and is compatible with all major types of mineral and semi-synthetic motor oil, meeting API SM/CF requirements for superior performance. To use, pour directly into the engine without overfilling. If performing a full oil and filter change, drain the oil, fit a new oil filter, and refill with motor oil, replacing 500 ml of oil with 500 ml of SLICK 50 Engine Treatment. Check the oil level. Use at every oil change for maximum effectiveness or at least every 12,500 miles / 20,000 km. Always replace oil and filters according to manufacturer recommendations. Please dispose of oil at an approved disposal or recycling facility. Wash thoroughly after contact.