This is my first UOA after the head gasket repair.
After the repair, I filled the engine with a mix of various oils from my shelf. Then, the engine was idled for an hour followed by an oil and filter change with Supertech Syn 0w20. I followed up with yet another oil and filter change several hundred miles later (IIRC) with SuperTech Syn 0w20. Finally I performed an oil change after another 1800 miles using the Idemitsu that was tested. So, the engine should have been fairly "flushed out" before the Idemitsu was installed.
Filter was Genuine Toyota.
After the repair, I filled the engine with a mix of various oils from my shelf. Then, the engine was idled for an hour followed by an oil and filter change with Supertech Syn 0w20. I followed up with yet another oil and filter change several hundred miles later (IIRC) with SuperTech Syn 0w20. Finally I performed an oil change after another 1800 miles using the Idemitsu that was tested. So, the engine should have been fairly "flushed out" before the Idemitsu was installed.
Filter was Genuine Toyota.
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