39Champ Posted April 2, 2009 Share Posted April 2, 2009 What is the correct engine oil to use in my 39 Champion. I've been using Quaker State 30wt. I've read about modern oils causing rapid camshaft wear. Is there a different brand oil, or an additive I should be using?? Thanks, Norm in Texas Link to comment Share on other sites More sharing options...
Guest stude8 Posted April 2, 2009 Share Posted April 2, 2009 NormAll motor oils have a "Service Rating" notice on the container, look for <span style="color: #000099"><span style="text-decoration: underline"><span style="font-weight: bold">API Service SJ</span></span></span> or lower alphabetically (SH, SG, SF examples). Present production oils are going to say <span style="font-weight: bold">SM</span> that is the formula that has reduced Zinc chemical content that is what early flat tappet engines require.For my 1928 Studebaker I buy Shell Rotella T straight 30W oil with SJ rating at Tractor Supply or Rural King farm stores. It also bears the CF-4 rating which stands for "Compression" ignition (Diesel) engines. The "S" rating stands for "Spark" ignition engines. Diesel oil has even greater Zinc content than spark engine oils.The following link takes you to a thorough article on this subject by Rocky Mountain Model A club members. It is a good item to read and save.http://www.rockymountainmodelaclub.org/Technical_Info/Engine/WHICH%20OIL%20TO%20USE%20by%20Russert%20and%20Wiedeman%20Rev%20B%20HTM/WHICHO_1.HTMStude8 Link to comment Share on other sites More sharing options...
Guest Don Aust Posted April 3, 2009 Share Posted April 3, 2009 Thanks Stude8 for the link to the Rocky Mountain Model A Club. Good site with lots of info. There is always something to learn (at least for me). Link to comment Share on other sites More sharing options...
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