Originally Posted By: 09_GXP
Originally Posted By: zeng
The other UOA(PUP 5W30) you referenced to is considered good as it is fit for continuing service.
http://www.bobistheoilguy.com/forums/ubb...00_#Post4184063
In relative terms, your UOA(M1 5W30) is bad and require immediate replacement.
Better still, if you are stuck at 5W30, then consider Magnatec 5w30.JMHO.
I'm curious here. What makes the PUP sample serviceable and mine requiring immediate replacement? If mine does require immediate replacement why would I "step down" to Magnatec? I'm sure Castrol would recommend Edge if I am currently using M1.
First, look at the summary as tabulated below:
a)Properties: b)Your M1 5W30 FullS;
c)Strawdog's PUP 5W30 FullS; d)KJ Smith's Magnatec 5W30 SemiS
a)Miles: b)5524 mi;
c)5400 mi; d)9278 MI
a)Fuel dilution: b)0.5;
c)0.8; d) a)KV100 cSt used: b)
7.84;
c)8.43; d)10.26
a)KV100 cSt virgin: b)11.0 cSt;
c)10.3 cSt; d)11.2 cSt
a)KV drop %: b)
28.7%;
c)18.1%; d)8.4%
a)Flash P used: b)
355*F;
c)370*F; d)370*F
a)FP virgin : b)446*F;
c)435*F; d)
min 360*F
a)FP drop *F: b)
91*F;
c)65*F; d)*unknown
a)Insolubles: b)
0.3%;
c)0.2%; d)0.3%
a)TBN used: b)
N/A;
c)4.1; d)
1.6
a)Al: b)
9;
c)7; d)4
a)Cr: b)
1;
c)0; d)1
a)Fe: b)
29;
c)22; d)8
a)Cu: b)6;
c)12; d)4
a)Si: b)43;
c)47; d)19
Note:
abc denotes the most inferior properties among the samples.
In comparison with Strawdog's PUP 5W30 sample, your used sample is :
1)having lower KV@100*C of 7.84 cSt with bigger percentage drop in KV100 of 28.7%(a percentage probably most OEM's would've it condemned), despite having a higher virgin KV100 and lower fuel dilution of 0.5%;
2)having a lower used Flash Point of 355*F and experiencing biggest FP drop by 91*F, despite having a higher virgin FP of 446*F and a lower fuel dilution of 0.5%;and
3)having higher insolubles of 0.3% and generally higher wear metal ppm.
Hence, I'm of the opinion your sample is far inferior to that of Strawdog's PUP 5W30 of residual TBN of 4.1.
Also note KJ Smith's Magnatec
blend 5W30 at
9278 miles is NOT inferior to your 5400 mi sample.
JMHO.