Just did the intake gaskets on my '92 Chevy truck. I don't think there was much if any coolant in the oil prior to replacing the gaskets. Removing the intake did leak some coolant into the lifter valley. I've put in some inexpensive oil (Havoline 10/w-30) and cheapo filter to flush the engine. How long should I run this oil before going back to my Rotella T5 10w-30 (and Wix filter)?
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