Yes sir on the wait for the second oil change to go syn. Reason is as you said let things wear in.
Now any reasonably thinking person ought to have a flare come on in their head with this........don't use syn. initially because the engine needs to wear in first???????????
When I bought my new tractor in '07 (I said '05 the other day but I had a brain F.....) It had a Cummins naturally aspired diesel.
I wanted to run Rot T full syn 5w-40. so I called Cummins USA and asked them if I could use it. I got a polite reply back that said: Sir, your Cummins diesel will LOVE you for using that oil. Just wait till time to change out the original fill (of paraffin oil)".
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Today's Featured Article - Restoration Story: 1929 McCormick-Deering 10-20 - by Randal Simmon. On July 4th 1998 my dad and I was sitting on the front porch when he said that he was going to sell his two 10-20's to a junk man. He said that the junk man was going to give him $500 for both of them but he hadn't received the money for them yet. So I went into the house and wrote him a check for $500 and bought them myself and said now they are mine. He had bought them about five years before thinking that he was going to restore them himself. After five years sitting in the barn, he changed h
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