Schaeffers 5w30 on chev 350.

[BOBISTHEOILGUY]

here is another sample comparison done by Dyson Analysis.. we have a gasoline engine, 350cid, in a chevrolet 1500, yr 2000. using a fram oil filter,with 5w30. had 2 analysis done. first one was mobil's full synth 5w30 with 4,263 miles on it. the second one was schaeffers 5w30 blend with 9,000 miles. here are the numbers direct from the report.

code:

---

item......mobil's.... schaeffers

h2o....... 0.11..........05

fuel..... 01......... 01

visc...... 11.4........11.8

solids..... TR..........TR

oxd....... 32.2........32.2

nox....... 40.0........30.0

tbn.base=12. 5.6. base=8.3...3.6

Fe......... 54..........41

Cr......... 1...........1

lead....... 32..........18

copper..... 40..........44

tin......... 3...........3

alum........ 6...........7

nickel...... 1...........1

manganese... 1...........1

silicon... ..15..........20

boron....... 44..........36

sodium...... 16.........198

magnesium..1369...... ..383

cal.........378........1540

barium...... 0...........0

phos........960.........932

zinc..... .1187........1290

mo.......... 5..........95

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i find this kind of interesting since there is several differences.. one. full synth vs synthblend.. two, 4263 miles on full ver's, 9000 miles on blend.

[ August 23, 2003, 06:25 AM: Message edited by: BOBISTHEOILGUY ]

 

[Patman]

I was wondering about the viscosity. Is that the rating at 100C? Mobil claims their viscosity at 100c is around 10.0 cst, but on this sample it's much higher. Is that because of varience in production of the oil, or did the oil actually thicken up due to oxidation?

I've noticed from looking at technical data sheets that Mobil 1 tends to be thinner when new than others, do they do this because they fully expect it to thicken up when it oxidizes? It seems strange that a fully synthetic oil would even do this, in such a rather short interval.

Comments?

 

[BOBISTHEOILGUY]

Normally oils viscosity will thin down due to vi improvers starting to weakening, but after a time of that, the reverse would happen from contaminents where the oil could not fight them off. High levels of soot is another thing that would increase visc. Fuel on the other hand would tend to thin out the oil. Of course there is many more little factors that can affect the viscosity levels in a analysis report.

to answer your question on if it is a 100 c test or sus test, look at this chart and you can see for yourself how it has to be a 100c.

You'll also notice that the difference between 11.3 vs 11.8 surmounts to not much in comparision to each other.

[ October 06, 2002, 11:23 AM: Message edited by: BOBISTHEOILGUY ]

 

[Terry]

Very interesting run on this test. The average wear in ppm is 16.42 for Schaeffers, 19.57 for M1 trisyn. Without taking into account the mileage difference of schaeffer going almost twice the interval. The engine was fully broken in with over 20,000 miles of operation. Like alot of Chevy modular engines Nox is high. This test was run with ambient temps at and over 100F here in Sunnny Texas. Silicon is leaching of bonding agents (RTV) mostly. The increased heat may account for thickening the M1,oxidation was actually higher for M1 because drain on it was 1/2 of Schaeffer.

 

[Don M]

I always seem to see a higher nitration with Mobil vs others.

Don~