ValleyRD Mailing List: Fwd: Re: Trend Analysis Report

[Bob Heiser (w7ikt]

Dan this is part 2 oil analysis for N752Z

Plan to change oil and open the filter tomorrow.

-------- Forwarded Message --------

Subject:	Re: Trend Analysis Report
Date:	Wed, 10 Jul 2019 16:38:11 +0000 (UTC)
From:	Larry Nelson <lnelson [at] lnclabs.com>
To:	w7ikt [at] fly-web.us <w7ikt [at] fly-web.us>

Robert

looking a little closer at the results I have the following to pass on.  Your Oxidation value is indicating extended high oil temperatures.  elevation in this value is based on chemical processes in the oil that occur with long term thermal damage to the oil.  It also causes an increase in the viscosity of the oil.  Typical viscosity for a Rotella 15w40 is 13.5 to 14cSt (SAE Limits for 15w40 is 12.5-16.3cSt)  It appears that the high temperature exposure has increased your viscosity.  Iron is high for the Corvair motor.  Average for 25 hour operation is between 25 and 30ppm also with the elevation of Aluminum there is a potential for wear occurring on the Cam bearings, or wear could be from the piston and cylinder interaction.  Resample and check your trend.

Thanks for using LNC Labs

Larry Nelson

LNC Laboratories