Re: 359 Straight Eight Engine

Posted by R Anderson On 2010/12/26 13:14:29

Yes, oils for modern engines with roller cams are not at all suitable for old L-head engines with flat tappets, such as found in Packards. The zinc in oil that used to be there has been removed for emissions reasons for use in current cars. You can get Shell Rotella Diesel oil there in 15w40, I'm sure, which will work just fine for a Packard straight 8. Just ask your supplier for the best filter they make, or order them from Kanter or a similar supplier, I'd think they'd sell only good quality filters.