MC 5w20 , 10500 miles , 2004 Chevy Aveo

[Bambam]

Code:


TIME ON UNIT 75059

TIME ON OIL 10559

OIL TYPE Motorcraft

DATE SAMPLED 22-Feb-12

DATE RECEIVED 03-Mar-12

DATE REPORTED 09-Mar-12

OIL CHANGED Changed

OIL GRADE 5W20

LAB NO. 42020237575

OIL BRAND Ford

OIL ADDED 0





Metals (ppm)

Iron (Fe) 91

Chromium (Cr) 1

Lead (Pb)
Copper (Cu) 11

Tin (Sn) 2

Aluminium (Al) 9

Nickel (Ni)
Silver (Ag)
Titanium (Ti)
Vanadium (V)
Contaminants (ppm)

Silicon (Si) 13

Sodium (Na) 93

Potassium (K) 22

Water (%)
Coolant No

Additives (ppm)

Magnesium (Mg) 14

Calcium (Ca) 2227

Barium (Ba)
Phosphorus (P) 653

Zinc (Zn) 847

Molybdenum (Mo) 78

Boron (B) 18

Physical Tests

Viscosity (cSt 100C) 8.5

Physical / Chemical

Oxidation (Abs) N/A

Nitration (Abs) N/A



TBN 0.8


All wear levels appear within acceptable limits for first
sample. Silicon level (dirt/sealant material) satisfactory.
Water content acceptable. Viscosity within specified
operating range.


Comments please, did find a broken cracked air box, apparently someone couldn't get a screw out and forced the lid off,cracking the mounting area, probably the cause for a high silicon reading, as I don't agree with the lab.

 

[amm95]

They should told u to change it I hope as the TBN is below 2...your sample shows. (.8)

 

[amm95]

I see u did change it any way. Anything below 2 on TBN will need to be changed just so u know.

 

[volk06]

With the sodium and potassium, I'd say your getting alittle coolant into your system somewhere, which might be why your iron and copper are at the levels they are.

 

[Hokiefyd]

Who did this analysis? Did they include fuel/antifreeze/water numbers with the results?

 

[Bambam]

Originally Posted By: Hokiefyd
Who did this analysis? Did they include fuel/antifreeze/water numbers with the results?


ALS Tribology
Atlanta, Georgia
3121 Presidential Drive
Atlanta, GA 30340
800.394.3669

 

[Bambam]

Contaminants (ppm)
Silicon (Si) 13
Sodium (Na) 93
Potassium (K) 22
Water (%) Coolant No
Additives (ppm)
Magnesium (Mg) 14
Calcium (Ca) 2227
Barium (Ba) Phosphorus (P) 653
Zinc (Zn) 847
Molybdenum (Mo) 78
Boron (B) 18
Physical Tests
Viscosity (cSt 100C) 8.5

 

[addyguy]

Went way too far....TBN is shot, and wear metals are really high for the engine and miles.

I'm assuming this is just a beater you don't care about at all?

 

[Bambam]

Originally Posted By: addyguy
Went way too far....TBN is shot, and wear metals are really high for the engine and miles.

I'm assuming this is just a beater you don't care about at all?


I'm attributing the wear metals on dirt ingestion thru the busted air box. No not a beater, my SIL's commuter car that I lost track of and went a bit further on the oci than I intended too. I've fixed the air box and have PP in ther now, we'll see how it does now.

 

[addyguy]

Chevrolet's of this era called for 30-wt. oils, not 20-wt - why MC 5W-20?

I wonder if some of the wear is from a small hard-working engine with too-thin oil in it.

What grade of PP did you put in it?

 

[Bambam]

5w30

The 5w20 was an experiment that went outside the parameters I had mentally set.

This car does 90% highway and is not babied in the least, I'll probably take the PP to 10k .

 

[Brons2]

Originally Posted By: addyguy
Chevrolets of this era called for 30-wt. oils, not 20-wt - why MC 5W-20?


+1

Don't understand the oil choice or the OCI length. Too far, too thin.

The sodium and potassium numbers are also a major concern. Watch the coolant level, there could be a leak or a headgasket problem developing.

 

[ltslimjim]

Are Astros of this era also known to have LIM gasket leaks?

Also, agreed on the oil grade choice and interval length.

I'd even check on the PP at say 6,00 for how things are trending, especially if there is concern for coolant entry at all.

 

[Bambam]

Test results say no to coolant in the oil,there has been no loss of coolant either so I'll say there is no issue. I'll run PP to 7500 then sample.

I don't think the 5w20 was at fault and the results would have been fine had I checked/changed it earlier.

 

[JAG]

Coolant tests can give false negatives. If recently used oils did not contain sodium, I'd bet that there is a coolant leak since there is quite a bit of sodium and potassium.

 

[REDDOG]

Originally Posted By: JAG
Coolant tests can give false negatives. If recently used oils did not contain sodium, I'd bet that there is a coolant leak since there is quite a bit of sodium and potassium.


+1. Relatively small amounts of coolant will cook off and the oil can test negative. What were the previous two fills of oil?

 

[Bill in Utah]

Originally Posted By: ltslimjim
Are Astros of this era also known to have LIM gasket leaks?

Also, agreed on the oil grade choice and interval length.

I'd even check on the PP at say 6,00 for how things are trending, especially if there is concern for coolant entry at all.


Its a Aveo. 4 cyl small metro type ( I think they replaced the Metros) so nothing like a Astro. But to answer your question the 4.3l had (hopefully since I have a 2004 truck) fixed the gasket "issue".

Bill

 

[Bambam]

Last 2 fills were Mobil 1 Extended Performance 5w30 .

 

[Bill in Utah]

Originally Posted By: JAG
Coolant tests can give false negatives. If recently used oils did not contain sodium, I'd bet that there is a coolant leak since there is quite a bit of sodium and potassium.


The grade of oil did not help. I agree with JAG you have something not right here.

With that much sodium (and your last 2 changes with EP should have cleaned out any oil that had sodium) and potassium I'd get another UOA sooner than later with another lab.

They should have commented on the report.

Bill

 

[REDDOG]

Originally Posted By: Bill in Utah
Originally Posted By: JAG
Coolant tests can give false negatives. If recently used oils did not contain sodium, I'd bet that there is a coolant leak since there is quite a bit of sodium and potassium.


The grade of oil did not help. I agree with JAG you have something not right here.

With that much sodium (and your last 2 changes with EP should have cleaned out any oil that had sodium) and potassium I'd get another UOA sooner than later with another lab.

They should have commented on the report.

Bill


+1