Amsoil Oil Analysis

[Lhotka]

Seeking some input from the oil experts.



Here are the results from a current sample of Amsoil 5w30 HDD.



CU O

FE 11

CR 1

PB 3

AL 1

SI 2

MO 0

NA 1

MG 11

SN 0

AG 0

ZN 1060

B 0

K 0

W NEG

F NEG

A NEG

ST 14

OXI 1269

NIT 34

SUL 135

CST 10. 5



I am concerned about the change in oxidation which has increased 1269 ppm from 8 ppm. Sulfur increased to 135 ppm from 12 ppm.



Amsoil 5w30 HDD had 5,000 miles on it. Ran the truck on several -40F days this winter.



How do the numbers look?

 

[Don M]

I wonder if the amsoil had any calcium in this batch? I dont see any. Oxidation is usually in a percentage. I wonder too if the number is 12. 69 instead of 1269? Did it have any Phos in it?



The wear rates look real low.



Don~

 

[Lhotka]

Don your right.



Oxidation is reported as a percentage. The figure didn't contain a decimal point, so it propably is 12. 69% up from 8. 0%.



No reported Phos.



I switched to Delo Synthetic after the Amsoil change. Can wear rates still be trended when using different oils? Or are trends established using only one oil brand?

 

[Don M]

Many folks try different oils and see which ones give them the better performance over a few oil samples.

The Amsoil seemed to be doing good in your engine but we only had a single analysis. Try a few more samples on Delo and see what happens. If you plan on draining it every 5k or less dern near any quality oil with a good pour point will work for you.

Wonder how well the Amsoil did compared to the Delo in cold starting?



Don~