Code:
OIL 300V 5w30 300V 4T 5w40
MILES IN USE 5150 5026
MILES 67761 62611
SAMPLE TAKEN 4/7/12 5/11/11
ALUMINUM 4 10
CHROMIUM 0 0
IRON 13 7
COPPER 7 8
LEAD 2 2
TIN 0 1
MOLYBDENUM 598 157
NICKEL 0 0
MANGANESE 1 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 3 3
BORON 33 106
SILICON 13 11
SODIUM 6 2
CALCIUM 1562 2411
MAGNESIUM 913 25
PHOSPHORUS 884 871
ZINC 951 1073
BARIUM 0 0
INSOLUBLES 0.3 0.2
WATER 0 0
FLASHPOINT ºF 405 385
SUS VIS 210ºF 65.3 68.6
cSt @ 212ºF 11.69 12.59
TBN 5.1 2.2
TAN 6.8
Blackstone comments:
Thanks for the detailed note you included with this used oil sample. Just because an engine see a lot of WOT runs and is driven aggressively doesn't necessarily mean that it is abused or not in good condition. Your S4's V8 is a perfect example of that at 67,761 miles. Universal averages for Audi's 4.2L engine are based on about 5,600 miles on the oil. This oil was in use for 5,150 miles and wear compares well with averages. The viscosity read up in the 5w40 range, but that wasn't a problem. The TBN was strong at 5.1 and the TAN was acidic at 6.8.
Interesting how my wear metals all went DOWN on the 5w30 verus 5w40 despite being run for an almost identical amount of time, same number of track days/autocrosses, and the same amount of makeup oil added.
I'm glad to see the aluminum number come down after two consecutive "high" UOAs.
Also looks like the "4T" 5w40 I ran last time does indeed contain more boron and calcium than it's auto version, but less magnesium and moly. I wonder if that extra moly in the auto version is why the wear numbers looked better?
Should I be changing this sooner due to the very high TAN-TBN ratio? Blackstone flagged the viscosity as being out-of-range...so this actually thickened over the course of the OCI.
New fill is Renewable Lube Bio-SynXtra 0w30 (VOA coming shortly).
OIL 300V 5w30 300V 4T 5w40
MILES IN USE 5150 5026
MILES 67761 62611
SAMPLE TAKEN 4/7/12 5/11/11
ALUMINUM 4 10
CHROMIUM 0 0
IRON 13 7
COPPER 7 8
LEAD 2 2
TIN 0 1
MOLYBDENUM 598 157
NICKEL 0 0
MANGANESE 1 1
SILVER 0 0
TITANIUM 0 0
POTASSIUM 3 3
BORON 33 106
SILICON 13 11
SODIUM 6 2
CALCIUM 1562 2411
MAGNESIUM 913 25
PHOSPHORUS 884 871
ZINC 951 1073
BARIUM 0 0
INSOLUBLES 0.3 0.2
WATER 0 0
FLASHPOINT ºF 405 385
SUS VIS 210ºF 65.3 68.6
cSt @ 212ºF 11.69 12.59
TBN 5.1 2.2
TAN 6.8
Blackstone comments:
Thanks for the detailed note you included with this used oil sample. Just because an engine see a lot of WOT runs and is driven aggressively doesn't necessarily mean that it is abused or not in good condition. Your S4's V8 is a perfect example of that at 67,761 miles. Universal averages for Audi's 4.2L engine are based on about 5,600 miles on the oil. This oil was in use for 5,150 miles and wear compares well with averages. The viscosity read up in the 5w40 range, but that wasn't a problem. The TBN was strong at 5.1 and the TAN was acidic at 6.8.
Interesting how my wear metals all went DOWN on the 5w30 verus 5w40 despite being run for an almost identical amount of time, same number of track days/autocrosses, and the same amount of makeup oil added.
I'm glad to see the aluminum number come down after two consecutive "high" UOAs.
Also looks like the "4T" 5w40 I ran last time does indeed contain more boron and calcium than it's auto version, but less magnesium and moly. I wonder if that extra moly in the auto version is why the wear numbers looked better?
Should I be changing this sooner due to the very high TAN-TBN ratio? Blackstone flagged the viscosity as being out-of-range...so this actually thickened over the course of the OCI.
New fill is Renewable Lube Bio-SynXtra 0w30 (VOA coming shortly).