Oil analysis 7339 miles

[KLS]

Tundra V8
34,159 miles on the engine
7,339 miles on the oil (sampled, not drained)
Schaeffer #703 10W-30 synthetic blend
-0- make up oil
Toyota Denso 90915-20004 filter (not changed)
Lab: CTC Reno

Iron                11 ppm (1.5 ppm per 1000 miles)
chromium            1
lead                5
copper             14
tin                 5
aluminum            1
silicon             2
fuel               nil
viscosity          10.3 (30 wt)
water              nil
solids             0.3%
oxidation         .03
nitration         .01
TBN               6.1
"No corrective action needed."

Needless to say, I like this oil. 1.5 ppm of iron per 1000 miles looks good to me, and this oil is still good @ 7339 miles. I'll do another analysis at 10k.


Ken

[Verndog]

Looks good...Can you tell me where you are testing your oil, and the cost? I see tha lab but not sure where to take it in. I may have asked once and forgot to copy the info into your Schaeffer oil info you gave me.

Thanx
Kevin

[KLS]

Schaeffer supplies oil sample mailers to their customers. Schaeffer's lab in St. Louis is $7.50, but the mail can take weeks. CTC in Reno is $9, and WebCheck in North Carolina is $12 with the response on the web.


Ken

[code54]

This is very interesting to me but could someone explain what all this means. When I send mine in what should I be looking for and what is "BAD".
THANKS

[akauth]

Originally Posted by code54

This is very interesting to me but could someone explain what all this means. When I send mine in what should I be looking for and what is "BAD".
THANKS

Usually the lab will flag samples that are out of "normal".

Alan

[KLS]

Looking at the back side of the sheet from CTC, the whole page is explaining the meaning of the results on the front side. For example, it says wear metals such as chromium can come from rings, roller/taper bearings, rods, platings. Lead can come from bearing overlays, or an additive in oil or fuel. There are descriptions for all items for which they test. This lab marks out-of-range results as either Abnormal or Critical. They also provide Analysis Recommendations..."Results of test performed indicate no corrective action required." Some items aren't that clear. The test for silicon cannot tell the difference between silica from dirt that gets past the air filter, silicone leached from gaskets and seals, and silane anti-foam in the oil--in this case a trend is important, as are the results shown of tests of similar engines.


Ken

[code54]

Great, thank you for the information. Is it worth getting it done with only 1000 miles on my truck or should I wait a little while? Thanks

[akauth]

Originally Posted by code54

Great, thank you for the information. Is it worth getting it done with only 1000 miles on my truck or should I wait a little while? Thanks

You might do it at 5,000 miles when you change the oil but the real reason is to establish a changing schedule. After you know how long the oil lasts with sampling, then you don't really have to sample any more (but once in a while as a check to make sure nothing is going on).

alan