This filter has been in use 13 months / 5k miles since I changed the oil last time. It had Valvoline 10w-30 in it and the owner had to put 2qt in it make up oil. How often he has had the oil changed in the past I do not know but if I had to guess he didn't keep track. I had to let him know it was over a year this time since I changed it last. It see's short 2 mile trips. Not many highway miles. Personally I think it would be best for him to change it twice a year with simple conventional. Since the mileage is short trips. Truck has 244k miles on it.