Re: Which Engine Oil?

Posted by Owen_Dyneto On 2007/10/3 10:18:18

I certainly agree that you should refrain from using detergent oil in a dirty engine. But just routine maintenance of our Packards should include (as the factory recommended) routinely removing the oil pan and cleaning it, the pump intake, etc. The 300 referenced in this post could have hydraulic lifters which pretty much require detergent oil. As the to presence of the greatly reduced amounts of ZDDP in such oils as Rotella T, Delo, etc., I think the jury will be out for some time yet, but there is plenty of this (API CI-4 or CI-4+, but not CJ-4) to be found on shelves.