superglide..
Have you discussed your problem with the dealership?
I do not think the filter is the problem. If you change brands and the same problem happens, that should eliminate the filter as the reason for what you are encountering.
You may have a problem with the oil pump regulating valve.
Or you could have other internal engine problems with tolerances and clearances or something.
Of course the computer diognostics may show what the problem is. But sometimes they don't and it takes good old fashioned mechanics knowledge to know what is the problem.
My boss had a new car that when he tried to get on the freeway the power wasn't there. It felt like it died. It took time to get up to speed. Needless to say it was a safety problem as he about got run over a time or two.
He took the car to the dealership, left it for a week, as he was travelling, and asked them to fix it. They put it on the computer, diagnosed that it was a fuel pump problem, replaced the pump.
Didn't solve the problem. So once again he left it with them for a week when he went out of town. They changed some computer module.
Didn't solve the problem. So he asked the service manager to come drive the car. So he did. They went to get on the freeway, the service manager hit the gas..and no power.
Now they admitted there was a problem. They checked the computer again. Tried everything. Called the factory. Checked every service bulletin. No one could figure out why this was happening.
They were to the point of getting him a new motor or new car.
Then a retired mechanic was in the shop visiting his old buddies. They told him about the problem and no one could figure out why.
He said the crankshaft was installed wrong when the engine was built. That he had seen that before and that's what caused the problem.
So the service manager told my boss about it and said they could tear the engine apart and fix it or he could try to get authorization to order a new vehicle. So he said he liked the car he had and to go ahead and check the crankshaft. Sure enough, the "old" mechanic was right and the dealership fixed the problem.
Sometimes it isn't computers that know everything..