Accel's non-detergent motor oil is a good oil for older cars and trucks that are used during mild operating conditions. It's also useful in industrial applications that specify a non-detergent oil. This oil is not recommended for use in automobiles built after 1930. However, if you have an old engine that has been running its entire life on non-detergent oil, it's best to keep using non-detergent oil unless you're doing a total overhaul. For applications requiring a a non-detergent oil with a 30-Weight viscosity, use this Accel product. | Accel 30W Non-Detergent Motor Oil | Size 1 qt