Can you use synthetic motor oil for longer than recommended intervals without damaging your vehicle's engine? - Quora
![Does oil have a shelf life? I bought this case of full synthetic oil probably 10 years ago when it was on a killer deal. Still good? : r/MechanicAdvice Does oil have a shelf life? I bought this case of full synthetic oil probably 10 years ago when it was on a killer deal. Still good? : r/MechanicAdvice](https://preview.redd.it/tdzuinlncub71.jpg?auto=webp&s=d9f81236722ff913379a92c4a5857a6bc73f096c)
Does oil have a shelf life? I bought this case of full synthetic oil probably 10 years ago when it was on a killer deal. Still good? : r/MechanicAdvice
![Amazon.com: Royal Purple SAE 5W-30 Synthetic Motor Oil – 7 quarts and a 30-990 Extended Life Premium Oil Filter (9905W307QT) : Automotive Amazon.com: Royal Purple SAE 5W-30 Synthetic Motor Oil – 7 quarts and a 30-990 Extended Life Premium Oil Filter (9905W307QT) : Automotive](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81M1z45FnoL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Royal Purple SAE 5W-30 Synthetic Motor Oil – 7 quarts and a 30-990 Extended Life Premium Oil Filter (9905W307QT) : Automotive
![Valvoline High Mileage with MaxLife Technology Synthetic Blend 5W-30 Motor Oil: Maximize Engine Life, 5 Quart 881163 - Advance Auto Parts Valvoline High Mileage with MaxLife Technology Synthetic Blend 5W-30 Motor Oil: Maximize Engine Life, 5 Quart 881163 - Advance Auto Parts](https://shop.advanceautoparts.com/wcsstore/CVWEB/staticproductimage/13630/large/11706057_vlv_881163_pri_larg.jpg)
Valvoline High Mileage with MaxLife Technology Synthetic Blend 5W-30 Motor Oil: Maximize Engine Life, 5 Quart 881163 - Advance Auto Parts
![Valvoline Full Synthetic High Mileage with MaxLife Technology 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart VV180 - Advance Auto Parts Valvoline Full Synthetic High Mileage with MaxLife Technology 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart VV180 - Advance Auto Parts](https://shop.advanceautoparts.com/wcsstore/CVWEB/staticproductimage/13630/large/8080051_vlv_vv180_pri_larg.jpg)
Valvoline Full Synthetic High Mileage with MaxLife Technology 10W-30 Motor Oil: Maximizes Engine Life, 1 Quart VV180 - Advance Auto Parts
![Amazon.com: Royal Purple SAE 5W-30 Synthetic Motor Oil – 6 quarts and a 10-969 Extended Life Premium Oil Filter (9695W306QT) : Automotive Amazon.com: Royal Purple SAE 5W-30 Synthetic Motor Oil – 6 quarts and a 10-969 Extended Life Premium Oil Filter (9695W306QT) : Automotive](https://m.media-amazon.com/images/W/MEDIAX_792452-T2/images/I/81KZ3425kIL.jpg)