Not so near as great as my run with the 0w-30 for 10k last time:
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=918755&fpart=1
This run was taken using the recommended EaO filter for the full time frame. Hot sample, taken near the beginning of the drain. Mixed octanes on the fuel (higher octane in the hot months, lower octane in the cooler months). Some 20 passes at the the local dragstrip. The car was full qt low at the time of the sample, but I had not added any oil in the last month or so, knowing that I would be sending a sample of for analysis, and I did not want skewed results with fresh oil.
Having added 2 qts in this 15k mile UOA + the 1 qt I was low makes for 3 qts burned in this interval. 5k miles per qt, that is better than the 4k miles per qt I got on the 0w-30... though Blackstone definately liked the 10k results on the thinner oil A LOT better.
I put more 5w-30 in after the sending the sample off. I bought a couple of strong magnets from the Homo Depot and put them on the side of the filter. The drain plug from the factory is not magnetized, so maybe the magnets will help lower my iron count for next time.
Also, I am debating a filter change at 7500 miles, but not sure that that would help given my insoluables level was still within reason.
Guys, I value your comments, this world is very new to me, and I still don't feel real comfortable recommending a 15k mile oil drain on this oil.
----------------------------------------------
BLAKE: We think now is the time to change this fill of 5W/30. Iron, copper, and lead all increased, which shows excess wear at the bearings. The increased wear is likely due to the longer oil run but we think 15,541 miles may be too many for your 5.3L.
Universal averages are based on an oil run of just 5,600 miles. No harmful contaminants were found and the viscosity read normally. It was just slightly higher than we found the last time.
The TBN read 2.2 so there wasn't much active additive remaining. 1.0 is low. Check back in 10,000 miles to monitor.
CRESSON, TX 76035
EQUIPMENT MAKE:...GM
EQUIPMENT MODEL:..5.3L 327 CI V-8
FUEL TYPE:.........Gasoline (Unleaded)
CODE:..............GXP
ADDITIONAL INFO:...LS4
REPORT DATE:.......1/7/08
NAME:..............BLAKE MOORE
E-MAIL:[email protected]
OIL USE INTERVAL : 15,541 Miles
OIL TYPE & GRADE: Amsoil 5W/30
MAKE-UP OIL ADDED: 2 qts
OIL REPORT
MI/HR ON OIL :.....15,541
MI/HR ON UNIT:.....38,569
SAMPLE DATE:.......12/23/07
*PARTS PER MILLION* / UNIVERSAL AVERAGES / 10k sample of 0w-30
ALUMINUM........3...............4...............3
CHROMIUM........1...............1...............1
IRON............51..............22..............19
COPPER..........78..............59..............65
LEAD............18..............9...............11
TIN.............1...............1...............2
MOLYBDENUM......52..............53..............14
NICKEL..........1...............1...............1
MANGANESE.......2...............2...............2
SILVER..........0...............0...............0
TITANIUM........0...............0...............0
POTASSIUM.......2...............1...............4
BORON...........34..............56..............9
SILICON.........18..............25..............14
SODIUM..........9...............10..............9
CALCIUM.........3229............1762............2877
MAGNESIUM.......12..............338.............13
PHOSPHORUS......661.............770.............697
ZINC............828.............932.............787
BARIUM..........0...............0...............0
TEST.....VALUES SHOULD BE.......TESTED VALUES WERE
WATER %.............
ANTIFREEZE %..........0.................0.0
FUEL %..............
FLASHPOINT INºF.....>365................420
SUS VISCOSITY@210ºF: 56-63.............62.4
cSt Viscosity @ 100°C: 10.90...........10.41
INSOLUBLES %........<0.6................0.3
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=918755&fpart=1
This run was taken using the recommended EaO filter for the full time frame. Hot sample, taken near the beginning of the drain. Mixed octanes on the fuel (higher octane in the hot months, lower octane in the cooler months). Some 20 passes at the the local dragstrip. The car was full qt low at the time of the sample, but I had not added any oil in the last month or so, knowing that I would be sending a sample of for analysis, and I did not want skewed results with fresh oil.
Having added 2 qts in this 15k mile UOA + the 1 qt I was low makes for 3 qts burned in this interval. 5k miles per qt, that is better than the 4k miles per qt I got on the 0w-30... though Blackstone definately liked the 10k results on the thinner oil A LOT better.
I put more 5w-30 in after the sending the sample off. I bought a couple of strong magnets from the Homo Depot and put them on the side of the filter. The drain plug from the factory is not magnetized, so maybe the magnets will help lower my iron count for next time.
Also, I am debating a filter change at 7500 miles, but not sure that that would help given my insoluables level was still within reason.
Guys, I value your comments, this world is very new to me, and I still don't feel real comfortable recommending a 15k mile oil drain on this oil.
----------------------------------------------
BLAKE: We think now is the time to change this fill of 5W/30. Iron, copper, and lead all increased, which shows excess wear at the bearings. The increased wear is likely due to the longer oil run but we think 15,541 miles may be too many for your 5.3L.
Universal averages are based on an oil run of just 5,600 miles. No harmful contaminants were found and the viscosity read normally. It was just slightly higher than we found the last time.
The TBN read 2.2 so there wasn't much active additive remaining. 1.0 is low. Check back in 10,000 miles to monitor.
CRESSON, TX 76035
EQUIPMENT MAKE:...GM
EQUIPMENT MODEL:..5.3L 327 CI V-8
FUEL TYPE:.........Gasoline (Unleaded)
CODE:..............GXP
ADDITIONAL INFO:...LS4
REPORT DATE:.......1/7/08
NAME:..............BLAKE MOORE
E-MAIL:[email protected]
OIL USE INTERVAL : 15,541 Miles
OIL TYPE & GRADE: Amsoil 5W/30
MAKE-UP OIL ADDED: 2 qts
OIL REPORT
MI/HR ON OIL :.....15,541
MI/HR ON UNIT:.....38,569
SAMPLE DATE:.......12/23/07
*PARTS PER MILLION* / UNIVERSAL AVERAGES / 10k sample of 0w-30
ALUMINUM........3...............4...............3
CHROMIUM........1...............1...............1
IRON............51..............22..............19
COPPER..........78..............59..............65
LEAD............18..............9...............11
TIN.............1...............1...............2
MOLYBDENUM......52..............53..............14
NICKEL..........1...............1...............1
MANGANESE.......2...............2...............2
SILVER..........0...............0...............0
TITANIUM........0...............0...............0
POTASSIUM.......2...............1...............4
BORON...........34..............56..............9
SILICON.........18..............25..............14
SODIUM..........9...............10..............9
CALCIUM.........3229............1762............2877
MAGNESIUM.......12..............338.............13
PHOSPHORUS......661.............770.............697
ZINC............828.............932.............787
BARIUM..........0...............0...............0
TEST.....VALUES SHOULD BE.......TESTED VALUES WERE
WATER %.............
ANTIFREEZE %..........0.................0.0
FUEL %..............
FLASHPOINT INºF.....>365................420
SUS VISCOSITY@210ºF: 56-63.............62.4
cSt Viscosity @ 100°C: 10.90...........10.41
INSOLUBLES %........<0.6................0.3
