Re: what kind of oil do I use in a 1951 Packard 300

Posted by Owen_Dyneto On 2009/5/8 16:47:08

I'd avoid SAE10W-40 and would absolutely avoid SAE5W-20. 10-30 should be fine as Rusty suggests, and many folks prefer to use SAE15W-40 intended for trucks and light diesels as it contains a somewhat better anti-wear package of additives. Whether it's really better is debateably, kind of "might help, can't hurt".