Here are the two samples I've done with my V10. Both were Schaeffer 7000 5W-20 oil. Interested in your opinions and ideas, particularly my second sample. Blackstone's notes are below too.
Running the Motorcraft FL-820S oil filter. My truck sees a lot of unloaded freeway miles during the week, city driving on the weekend and 2,000-3,000 miles of towing at trailer during the summer.
Code:
Sample #1 Sample #2 Universal Averages (Blackstone)
Miles on Oil 5,967 5,500 4,400
Miles on Truck 22,250 40,106 n/a
Aluminum 4 4 4
Chromium 1 1 1
Iron 23 17 18
Copper 7 6 4
Lead 4 0 1
Tin 0 2 0
Molybdenum 290 244 64
Nickel 1 1 1
Manganese 1 1 2
Silver 0 0 0
Titanium 0 0 0
Potassium 0 1 2
Boron 21 8 50
Silicon 17 12 19
Sodium 11 203 31
Calcium 1,923 1,513 2,174
Magnesium 38 51 176
Phosphorus 738 647 742
Zinc 900 705 908
Barium 0 0 1
Code:
Sample #1 Sample #2 Should Be
SUS Viscosity at 210d F 51.4 50.1 46-59
cSt Viscosity at 100d C 7.70 7.31 6.0-10.2
Flashpoint (F) 385 350 >355
Fuel %
Anitfreeze % 0 ? 0.0
Water % 0 0
insolubles % 0.2 0.3 pre>
Here is what Blackstone wrote for my two samples:
Sample #1: Wear looks fine in this sample. Universal averages are based on only 4,400 miles on the oil, so the extra iron in your oil was simply due to the longer oil run. No contamination was present. Run 8,000 miles on your next fill.
Sample #2: The increase in sodium caught our attention, since it can show coolant contamination in the oil. With no excess potassium present (another marker for coolant) and your engine having only clocked 40,106 miles since leaving the factory, we truly doubt the sodium is from coolant though. Maybe this was a different type of oil or Schaeffer's changed their additive package a little bit since the June 2011 sample? Whatever the case, wear read nice and low so the oil appears to be working well for your engine. The trace of fuel isn't cause for concern.
What do you guys think about the elevated Sodium and low flashpoint? Since I still have 19K-ish on my warranty, I'm thinking of dropping my OC frequency to the 4,400 average and getting a few more samples done to see if the problem increases or was just a fluke. I'm also thinking about switching to MC oil at my next change and doing a few with it to see how that looks in my engine.
Inputs and ideas appreciated...
Running the Motorcraft FL-820S oil filter. My truck sees a lot of unloaded freeway miles during the week, city driving on the weekend and 2,000-3,000 miles of towing at trailer during the summer.
Code:
Sample #1 Sample #2 Universal Averages (Blackstone)
Miles on Oil 5,967 5,500 4,400
Miles on Truck 22,250 40,106 n/a
Aluminum 4 4 4
Chromium 1 1 1
Iron 23 17 18
Copper 7 6 4
Lead 4 0 1
Tin 0 2 0
Molybdenum 290 244 64
Nickel 1 1 1
Manganese 1 1 2
Silver 0 0 0
Titanium 0 0 0
Potassium 0 1 2
Boron 21 8 50
Silicon 17 12 19
Sodium 11 203 31
Calcium 1,923 1,513 2,174
Magnesium 38 51 176
Phosphorus 738 647 742
Zinc 900 705 908
Barium 0 0 1
Code:
Sample #1 Sample #2 Should Be
SUS Viscosity at 210d F 51.4 50.1 46-59
cSt Viscosity at 100d C 7.70 7.31 6.0-10.2
Flashpoint (F) 385 350 >355
Fuel %
Anitfreeze % 0 ? 0.0
Water % 0 0
insolubles % 0.2 0.3 pre>
Here is what Blackstone wrote for my two samples:
Sample #1: Wear looks fine in this sample. Universal averages are based on only 4,400 miles on the oil, so the extra iron in your oil was simply due to the longer oil run. No contamination was present. Run 8,000 miles on your next fill.
Sample #2: The increase in sodium caught our attention, since it can show coolant contamination in the oil. With no excess potassium present (another marker for coolant) and your engine having only clocked 40,106 miles since leaving the factory, we truly doubt the sodium is from coolant though. Maybe this was a different type of oil or Schaeffer's changed their additive package a little bit since the June 2011 sample? Whatever the case, wear read nice and low so the oil appears to be working well for your engine. The trace of fuel isn't cause for concern.
What do you guys think about the elevated Sodium and low flashpoint? Since I still have 19K-ish on my warranty, I'm thinking of dropping my OC frequency to the 4,400 average and getting a few more samples done to see if the problem increases or was just a fluke. I'm also thinking about switching to MC oil at my next change and doing a few with it to see how that looks in my engine.
Inputs and ideas appreciated...
