PETRONAS Tutela ACTIFULL OT PREMIX is a ready to use OAT (Organic Acid Technology) coolant developed for Tier 4 engine using Selective Catalytic Reduction (SCR). Formulated to provide high grade protection for new generation low emissions engines, it can be also used for other engine types if compatible with OAT type coolants. Tutela ACTIFULL OT allows extended life and, therefore, longer coolant change intervals. Does not require the use of supplemental coolant additives (SCAs).