CITGO Petroleum Corporation's new CITGO SUPERGARD Synthetic Motor Oil is the perfect way to spoil passenger car, van, SUV and light truck engines. Available in SAE 5W-30 and 10W-30 viscosity grades, SUPERGARD Synthetic forms a barrier against varnish, sludge, rust, soot, oxidized fuel and other contaminants that can rob a turbo- or super-charged engine of performance.