Texas Tea Motor Oil 5W-30-100% Synthetic - API SN GF-5 Licensed - Extended Drain Intervals - Also See 1 Quart & 55 Gallon Drum Sizes 5 Gallon Bucket - Pail Licensed & Certified 100% Synthetic Oil API SN GF-5. Great wear protection and fuel economy benefits. Superior high- and low- temperature performance. Increased protection against sludge and harmful deposits. Made in USA. Free Shipping. Also meets ACEA C3 API SN for both gas and diesel cars.