quote:Why has there been this shift towards these more positive types of seals ?
Because the stock style umbrella seals are made of rubber that dries out over the years, becomes brittle, falls apart and distributes little pieces of hard, dried rubber into the oil system, where they often manage to get past the oil pickup screen, which leads to jamming the oil pump rotor, which leads to a sheared oil pump drive shaft, which leads to a non-functioning distributor which leads to a dead Pantera sitting in the road.
But it is certainly your choice.
