Red Line 5W30 Synthetic Oil - 1 Quart, Pack of 12 Formulated for turbo protection; Provides upper cylinder wear protection Prevents foaming even at high speeds; Reduces engine temperatures Increases high temperature oil pressure; Protects bearings at high speeds and temperatures Flows well in very cold climates; Allows extended drains in non-warranty vehicles Compatible with petroleum and synthetic oils; Compatible with seals designed for petroleum