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let's see. It HAS BEEN doing fine with 25k conventional oci (and its clean according to the OP) so how is a 10k OCI going to be sludge city?
I don't believe for a second this thing has had 25K OCIs.![]()
And I would NEVER do 25k ocis with any oil.

But in dozens of engines that I've seen at work (crown vics, F150-350, Dodge Caravans and Toyota Tundras ) with MANY MANY miles on them never seen any sludge or problem with any thing. And those engines are lucky to see a 7-10k oci... (with any bulk oil)
Just going with what the original poster stated...

Take care, Bill
