Oil Analysis

[hoss50]

I know the only people here that will care is Rob & maybe a few others.

I got the results of my 2nd oil analysis back for my 1998.5 Dodge 2500 Cummins. Both tests are of Amsoil 15w-40 oil. The first is with Fleetguard filters (changed ever 5K) & the second was with an Amsoil EAA filter never changed. Both tests are roughly 13,500 miles of use.

The main numbers listed by them are: #1 vs. #2

Iron:
21 vs 20

Copper:
1 vs 1

Lead:
5 vs 6

Aluminum
5 vs 4

Silicon
7 vs 3

Magnesium
30 vs 20

Both test yeild that the oil is suitable for continued use. Test fall within the normal range. I am seeing that the Amsoil filter looks to be doing a better job then 3 Fleetguards did. Fleetguards are good filters so Amsoil filter must be very good.

Harley

[I Am Batman]

Innnnteresting..... So you got 13k miles on the same oil with the 3 filters and the amsoil one did the same shit?

[daddyja]

Just be carefull, the wearmetals levels that are in your oil will only indicate part failure or pending failure. If you are trying to determine the life of the oil you need to have viscosity tests done. We use a COBRA (Complete Oil Rate Breakdown Analyzer) to determine oil breakdown and viscosity.

Oil analysis is all based on trend analysis. one or two samples will only show you what metal levels are currently in an oil. To detect pending failure you need to do routine sampling. so that you can develop a trend and see rises in the diferent wear metals.

Oil filters are only designed to filter out large particles. Those particle are larger than oil analysis can detect. When you have a oil sample analyzed the readings you get are in PPM (Parts Per Million) which are extremely small.

Your numbers are based off of engine wear, and honestly a filter will not do much to change your numbers, because once again the size of the metalic elements that oil analysis is detecting are so small they travel right through your filter.

Just my .02, but then again i do this for a living, but on $26M aircraft.

[hoss50]

The test I have done also includes viscosity, fuel % by volume, Soot % by weight, TBN, oxide, nitr, and other metals.

The viscocity the oils were 14.29 (#1) & 13.61 (#2)

Harley

[daddyja]

hoss50 said:

The test I have done also includes viscosity, fuel % by volume, Soot % by weight, TBN, oxide, nitr, and other metals.

The viscocity the oils were 14.29 (#1) & 13.61 (#2)

Harley

Thats good