Joe Gibbs Driven Racing Oil 00006 XP1 5W-20 Synthetic Racing Motor Oil - 1 Quart Bottle Single 1 quart bottle (32 oz) XP1 reduces friction and fights valve-train wear, especially in flat-tappet engines by utilizing multiple synthetic base oils, and anti-wear and friction reducing additives Ideal for Spec Miata, Formula Ford engines and V8 engines with clearances under 0025 Compatible with methanol and high octane race fuels XP1 can be blended with XP0, XP3 or XP6 to create custom viscosities