Oil Filter - Usage
NO.: 93-I-26DATE: March, 1993
GROUP: 6
CORP.NO.: 316102
SUBJECT:
CADILLAC OIL FILTER USAGE
Introduction of the 4.6L Northstar powertrain system in 1993 Eldorados, Sevilles, and Allantes included the first use of the PF58 oil filter. This filter is shorter than the PF45 filter previously used on 4.5L and 4.9L Cadillac V8 engines and is used to provide adequate ground clearance during all driving conditions. The PF58 filter must always be used on 4.6L engined vehicles. The PF45 filter, if used on 4.6L engines, may contact the road surface under some driving conditions and should not be substituted.
Some time after 1993 start of production Cadillac began using the shorter PF58 filter on 4.9L engined vehicles also. Our intent was to standardize Cadillac oil filters. Currently, however, the manufacturer is experiencing restrictions upon their ability to produce enough PF58 filters to supply dealer orders. Until we are able to eliminate these supply restrictions dealers should continue to use the PF45 on 4.9L engined vehicles and restrict usage of the PF58 to the 4.6L engine.