Red Line 10404-12PK 40 WT SAE 15W-40 Racing Motor Oil - 1 Quart Bottle, (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