Mobil 1 (120766) Extended Performance 5W-30 Motor Oil - 5 Quart Advanced full synthetic formula; helps prevent deposits and sludge build-up to enable long engine life;Helps to maintain stable oil viscosity Excellent overall lubrication and wear protection performance under many operating conditions; precise balance of performance additives Helps provide outstanding engine protection; outstanding thermal and oxidation stability Exceptional control of oil breakdown; provides exceptional engine protection Helps maintain long engine life and is compatible with engine seals; excellent low-temperature capabilities; quick cold-weather starting for fast protection and extended engine life