I am not saying Amsoil isn’t a higher quality product but everyone pushing Amsoil is saying that this will prevent AFM failure and I say that is not the case.
In 1992 I bought a 1986 Honda Accord 5 speed for college. When I bought it, it had about 80k miles on it. When I sold it in 6 years later it had 235k and I was very very hard on the car. Oil used was Texaco Havoline with a Fram oil filter changed every 3,000 miles. No mechanical issues with the car, ever. I changed the timing belt when required and had to change the clutch once.
the OP is frustrated by AFM failure which is caused by a poor design that is there only to increase fuel efficiency. The only way to confidently not have AFM failure is to remove that feature.