Penn-Grade 1 Partial Synthetic SAE 20W-50 Racing Oil is designed for use in turbocharged and non-turbocharged racing engines.  It is used in similar applications as the SAE 10W-30;  however, it provides a heavier viscosity that is commonly desired in high performance mud and dirt track racng engines.  It provides outstanding "heavy load" protection on highly stressed engine parts.  In addition to the benefits of the API SJ/CF service categories, it provides extra protection that is characteristic to our heavier SAE 20W-50 multi-viscosity racing oil. 12 Quart Case.