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I did not entertain going to synthetic in my cage until 10K miles. The bores and rings of R257 engines are quite a bit harder than the average sleeved aluminum cage engine, so I would wait AT LEAST 10k before going to synthetic.
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'99 Black SA "OBSSSN" - gone but not forgotten.
Not all good technology is new, not all new technology is good.
.........Purple is Satire.........
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