SS #670 Oil report

[Blackstone Laboratories]

I have my oil analyzed at Blackstone Laboratories about every year. One reason I choose them because they will send a sample kit for free. The cost of the analysis is $20.00. You can mail the sample in any mailbox (postage is $2.08 for the 6 ounce container). I have always received my results in less than two weeks.

All of the samples I've taken have been of Mobil 1 5W-30 synthetic oil.

Oil report Description

Here are the comments at 57082 miles:

CRAIG: We found very little change since the last sample from your GM engine. All wear was well below average for this type of engine, which, along with the steady wear trend, is a very good indication of normal wearing parts and careful operation. We found nothing from our test data that would suggest any kind of mechanical problem at 57,082 miles. If all engines looked this good, our job would be easy!

Here are the comments at 31456 miles:

CRAIG: Nice improvement (again). Wear at this point as about as low as we could expect to see from this type of engine after almost 3,000 miles on the oil. Everything is well below average levels, which is a good indication that no mechanical problems exist. The oil was physically normal for a 5W/30 and appears to be doing a good job for you. No fuel dilution, moisture or anti-freeze was found. Silicon continues to improve, so your air filtration is doing a good job for you. At 31,456 total miles, we have no problems to report.

Here are the comments at 19557 miles:

CRAIG: Copper is dropping out nicely, and may disappear completely in one or two more oil changes. Almost all other wear was at or below average for this type of engine, which is a very good indication of normal wearing parts. The oil's viscosity was in the normal range for 5W/30. No fuel dilution, moisture or coolant contamination was found. Insolubles (oil oxidation and blow-by) were low at 0.3% showing good oil filtration. At 19,557 total miles, your engine looks good.

Here are the comments at 13444 miles:

CRAIG: Copper still read quite high in this sample taken from the engine at 13,444 miles after 2934 miles use of the oil. Silicon improved nicely. All wear other than copper dropped as expected and were below average and easily normal. So long as copper drops to a third the iron count in the next two or three samples we will think your 5.7L engine a normal one. No gas, moisture or coolant found in the sample. Check back after 4,000 miles oil use.

Here are the comments at 4500 miles:

CRAIG: If this is a 350 engine the universal average file shows typical wear metals for the type after a routine run on the oil, and after wear-in. Your engine is still undergoing wear-in and the only high metal was copper, which we suspect will subside by 10,000 miles. Silicon will drop as well. This oil was 5W/30 Mobil 1 with no gas, moisture or coolant in suspension. We found no obvious problems in the sample and suggest checking back after wear-in.

Here are the report results:

Elements
ppm
@ 57082
miles
(3270)
@ 31456
miles
(2900)
@ 19557
miles
(2797)
@ 13444
miles
(2934)
@ 4500
miles
(2500)
Universal
averages
aluminum 3 3 5 4 6 4
chromium 1 1 2 2 2 1
iron 9 8 11 9 14 15
copper 14 18 39 51 95 41
lead 2 3 4 6 9 7
tin 0 2 2 3 9 2
molybdenum 72 2 3 2 3 53
nickel 1 0 1 1 1 1
manganese 1 1 1 1 2 1
silver 0 0 0 0 0 0
titanium 0 0 0 0 0 0
potassium 0         1
vanadium   0 0 0 0 0
boron 130 64 61 61 94 81
silicon 9 3 5 6 28 9
sodium 8 8 8 7 7 8
calcium 3433 850 834 882 826 2073
magnesium 48 1500 1364 1540 1366 1037
phosphorus 723 657 641 609 661 738
zinc 937 776 736 749 743 879
barium 0 0 0 0 0 0

Tested
properties
@ 57082
miles
(3270)
@ 31456
miles
(2900)
@ 19557
miles
(2797)
@ 13444
miles
(2934)
@ 4500
miles
(2500)
should be
SUS viscosity @ 210° 61.4 58.2 61.4 56.4 58.0 55-62
flash point in ° F 415° 400° 375° 380° 385° >365°
fuel % <0.5 <0.5 <0.5 <0.5 <0.5 <2.0
antifreeze % 0.0 0.0 0.0 0.0 0.0 0.0
water % 0.0 0.0 0.0 0.0 0.0 <0.1
insolubles % 0.1 0.2 0.3 0.4 0.4 <0.6

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