Schaeffer's 7k 5W-30, '10 Tahoe, 7348 mi

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2010 Chevy Tahoe 5.3 in police service. A little history: The FF was dumped at 1037 mi (I believe the OLM showed 75 % remaining-don't have the record handy). The OLM was not reset to keep the drain shorter with the second fill which is the data to the right(also Schaeffer's 7k 5W-30)-oil was changed with the OLM at 3% remaining, with 5793 mi on the oil. Analysis by Polaris. That's when this fill was installed (data set to the Left). The OLM read 0% when this oil was sampled/drained. The oil was in use for 7348 mi. 14,178 mi on unit. Analysis by Schaeffer's Webscope. Bear in mind if we compare with historical data for our units in this type of service these fills would include 150-220 hrs of idle time. That's like leaving your car running while you're at work-for 3 to 5.5 weeks! Both fills were with Napa Gold oil filters and used the factory air filter. Fe--38 ------50 Cr--2--------1 Al--5 -------4 Ni--1-------0 Cu-128--275 Pb--0----0 Sn--4----0 Cd--NA---0 V---0----0 Ag--0---0 Si--19---36 Na--21--10 K---7----3 Ti--0----0 Mo--390-268 Sb--NA-----2 Mn--NA ---8 Li--NA-----0 B---9-----11 Mg--22---16 Ca--1969--2026 Ba--0 ----0 P--- 938------697 Z----941------818 Fuel --NA---.8% TBN --NA--3.23 Water- None X2 Vis @100C--9.7- 9.4 Ox--20----13 Nit-13----23 No surprises here. Unit was refilled with another charge of the 7k and another Napa Gold.
 
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REDDOG

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Sep 11, 2004
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Iron, silicon and copper should continue to trend down some (A LOT for the copper-but it will take a while!). I'm happy with the reports especially for this type of service.
 
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