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Old 01-10-2020, 01:49 PM   #48
toggenburg
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Join Date: Apr 2010
Location: Beautiful Blue Ridge Mountains of Bedford, Virginia. Born once? Die twice. ------ Born twice? Die once.
Posts: 3,255

2001 SL1
Default Re: Unknown engine noise when cold

To be clear: with the fresh oil for the entire OCI interval.
i.e.
An oil change with a 5 qt capacity including filter change:
I put in 4 quarts of whatever synthetic OR dino oil, plus 1 quart Dexron III.
I then drain it out only at the 3000 mile interval, and repeat as stated.
Done this procedure continuously since the early 1970's without engine issues.
Also, until 18 years ago, I was in the Chicagoland area and always passed the annual automobile 'breath analyzer' test without failure.
I don't know if they still do that up there or not though, because Virginia where I am, does not require it at all.

Last edited by toggenburg; 01-10-2020 at 01:55 PM..

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