PF48 is longer. But, The PF48E primary performance improvement relates to the relief valve design. The PF48E has a compression spring loaded nylon poppet that outperforms the current valve design.
Other benefits:
- Element integrity (collapse strength) is increased by 25%. This is because the nylon cores are perfectly round.
- Filter media, which is unchanged, is no longer potted in adhesive which blocks filtration area at each end.
- Filtration performance (efficiency and capacity) are both unchanged.
- The filter shell configuration is unchanged. Existing cap wrenches continue to fit.
- Hydrostatic burst and impulse fatigue performance are both unchanged.
- Relief valve performance is much improved and statistically more stable.
- Hot oil durability is improved by elimination of adhesive.
- Cold weather performance (-30 C) with dexos 1 oil is Excellent.
- Improved level of robustness to water accumulation.
- Nitrile material used in the sealing gasket and the anti-drainback valve is unchanged.
- PF48E filters meet performance specifications as defined by GM Powertrain.
- PF48E filters will be used in OE production in the near future.
