| Oil Analysis Results [message #210141] |
Thu, 06 June 2013 22:18  |
Galen
Messages: 146
Registered: November 2011
Location: New Virginia, IA
Karma: 0
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http://www.gmcmhphotos.com/photos/member-galleries/p49437-blackstone-oil-report.html
I got my first report back from Blackstone. For background:I don't really know any history on my 78 PB w/ 403. I know it had a lot of work done in the 90s as there we a lot of upgrades, but I don't know what if anything was ever done to the engine. I've had it going on two years. Coach has 132,000 miles. I had an overheat I reported on here last fall.
I had maybe 3 or so hours run time, and maybe 550 miles on this oil sample. I posted this on the facebook group as well. Aluminum, Iron and Tin are high based on the "universal averages", whatever that means. Is this the average for 403s that blackstone has sampled?
Runs good, gets decent mileage (est 8-10 depending on how hard I push it), has plenty of power, no weird sounds, excessive oil consumption, etc... I was pleased with the "no coolant" report.
Galen Briggs
New Virginia, Iowa
1978 Palm Beach
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| Re: Oil Analysis Results [message #210149 is a reply to message #210141] |
Thu, 06 June 2013 22:55  |
Galen
Messages: 146
Registered: November 2011
Location: New Virginia, IA
Karma: 0
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Senior Member |
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OK I understand the universal averages now as I read the report explanation on their website. Seems a little skewed with know how large their sample is and the mileage of those vehicles. If the majority of 403s samples are somewhat recent rebuilds, broken in, I'd think trace element averages would be fairly low. It would seem to be a little more meaningful comparing high mileage to high mileage.
Galen Briggs
New Virginia, Iowa
1978 Palm Beach
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| Re: Oil Analysis Results [message #210154 is a reply to message #210149] |
Fri, 07 June 2013 00:01 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Blackstone is sampling and comparing GMC motorhome engines as a category. Your comparison numbers are to other GMCs.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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