Classic car and hot rod owners, this Lucas 20W-50 oil is specifically formulated for your babies! It's packed with high levels of zinc, molybdenum and phosphorus that create a tough, thick protective film for your engine - exactly what flat tappet cams, lifters and pushrods need. The paraffinic base oils and special additive package provide excellent thermal stability even when things get hot, and they protect against rust, corrosion and dry starts during those long periods when your classic isn't driven. It actually helps slow oil burning and improves pressure in worn engines, which is perfect for older vehicles. Works great with methanol and all racing fuels, and plays nice with both synthetic and non-synthetic oils. The 5-quart container means you've got enough for an oil change with some left over. Just remember - this is for muscle cars, classics, showroom cars and racing applications without catalytic converters. Not for modern passenger cars, but perfect for keeping your vintage engine running strong!