A front mounted oil line like the Olds V8 requires the 5 foot line. A back mounted line on an engine, the 4 ft would easily do, if not 3 ft, depending on gauge placement.
GBodyForum is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates.