Castrol Ultraclean synthetic blend engine oil is our cleanest GTX ever. Environmental factors such as poor fuel quality, hot weather and stop-start driving conditions can lead to the buildup of sludge that can reduce engine life, power and fuel economy. Castrol Ultraclean has a double-action formula proven to clean away the sludge that can block engine oilways and helps prevent new sludge formation from occurring. In fact, it provides up to 1.4X better sludge protection than is demanded by the latest industry standard (as measured in the Sequence VH Sludge test vs. API SP test limits). No other oil keeps engines cleaner. Product Features:Premium-quality base oils and anti-wear additives that help extend the life of your engine1.4X superior sludge protection compared to tough industry standards, as measured in the Sequence VH Sludge test vs. API SP test limitsAdvanced protection against viscosity and thermal breakdownSuperior protection against high-temperature depositsMeets or exceeds API SP/SN PLUS/SN, ILSAC GF-6 and latest Ford specs
