Kendall 5W/20 semi 7440 miles '03 MGM

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Jul 28, 2004
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OIL Kendall 5W/20 Semi-Synthetic

MILES IN USE 7,440

MILES 138,719

SAMPLE TAKEN 3/20/2017

Make Up Oil 0 qts



ALUMINUM 4



CHROMIUM 2



IRON 22



COPPER 6



LEAD 0



TIN 0



MOLYBDENUM 20



NICKEL 1



MANGANESE 0



SILVER 0



TITANIUM 98



POTASSIUM 1



BORON 70



SODIUM 6



SILICON 27



CALCIUM 2144



MAGNESIUM 10



PHOSPHORUS 746



ZINC 812



BARIUM 0



SUS VIS @ 210° F 52.0



cSt VIS @ 100° C 7.89



Flash F° 370



Fuel % 0.8



Antifreeze% 0.0



Water % 0.0



Insolubles % 0.3



TBN 2.0


Blackstone comments:
Universal averages show typical wear for this type of engine after ~5,300 miles on the oil. You went over 2,000 miles longer, yet wear metals compare pretty well. Iron read a little bit above average here simply because of the longer run. We did find silicon, which could be from harmless sealers or it could show dirt getting into the oil. It wouldn't hurt to check the air intake for any leaks just to be be safe. The fuel is fine since this amount can come from normal operation. The TBN is good, try 9,500 miles next?

I had the infamous intake manifold leak. It was replaced, the oil change before this one. So I'm hoping the silicon will go down next oil change.
 
This engine is susceptible to fuel dilution ?
Used oil is still serviceable though.
Ever consider extend OCI to 10K ?
 
Normally, I do 5500 mile OCI's, but I forgot to check my mileage and discovered I went over my usual interval. So I decided to do an analysis and make lemonade out of lemons. I must say the report has pleased me enough, that I'm going to run another 7500 mile OCI again and see if it does as well in the summer.
 
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