I have four analyses using various brands, because I wanted to cross-compare the results. The three-cylinder engine ran each oil 7000 miles (+/- a few miles).
Code:
MOBIL ENEOS MOBIL
5W-20 0W-20 0W-20 5W-20
4 4 3 4 aluminum
0 0 0 0 chromium
5 6 5 5 iron
3 7 7 5 copper
0 0 0 0 lead
0 0 0 1 tin
166 104 66 122 moly
0 0 0 0 nickel
0 0 0 0 manganese
0 0 0 0 silver
0 0 0 0 titanium
Code:
MOBIL ENEOS MOBIL
5W-20 0W-20 0W-20 5W-20
0 2 0 3 potassium
156 83 7 16 boron
3 5 3 4 silicon
11 10 7 7 sodium
2535 1532 2525 2333 calcium
33 726 31 131 magnesium
717 677 679 761 phosphorus
650 761 816 890 zinc
0 0 0 0 barium
4.4 4.6 4.4 3.8 TBN
3.9 3.7 3.3 3.7 TAN
5W-20 0W-20 0W-20 5W-20
MOBIL ENEOS MOBIL
Technician comments from last several reports:
5W-20: "Small amounts of fuel (1.0%) seem to want to show up often; it's really not harmful, and it's not hurting anything that we can see. It's not even diluting the viscosity (usually fuel thins the oil out). Some engines do routinely leave a little fuel in the oil, and it's not a problem. Anyway, at 183,000 miles, this engine is wearing beautifully, and no other contaminants turned up. The TBN and TAN are 4.4 and 3.9 respectively. Nice engine!"
0W-20: "Wear continues to be steady in this third sample of the series, and now there's not even any fuel dilution to talk about (0.1%) -- which is terrific! The TBN read 4.6, and the TAN is 3.7. The low silicon and insolubles readings show excellent air and oil filtration -- this is what we refer to as a perfect sample (and deservedly so). Nice!"
ENEOS: "After the same oil use interval, about the same amount of metal turned up, and that's exactly what we like to see -- steady wear. Fuel improved to just a trace, you really shouldn't waste a moment worrying about the trace that turned up here. The TBN and TAN are fine at 4.4 and 3.3 respectively, and no coolant, moisture, or abrasive dirt contamination was found. For the most part, wear is below the universal averages for this type of
engine, but averages are based on a longer 8,600-mile interval, so that's probably a big reason for these
lower numbers."
I love good news.
Code:
MOBIL ENEOS MOBIL
5W-20 0W-20 0W-20 5W-20
4 4 3 4 aluminum
0 0 0 0 chromium
5 6 5 5 iron
3 7 7 5 copper
0 0 0 0 lead
0 0 0 1 tin
166 104 66 122 moly
0 0 0 0 nickel
0 0 0 0 manganese
0 0 0 0 silver
0 0 0 0 titanium
Code:
MOBIL ENEOS MOBIL
5W-20 0W-20 0W-20 5W-20
0 2 0 3 potassium
156 83 7 16 boron
3 5 3 4 silicon
11 10 7 7 sodium
2535 1532 2525 2333 calcium
33 726 31 131 magnesium
717 677 679 761 phosphorus
650 761 816 890 zinc
0 0 0 0 barium
4.4 4.6 4.4 3.8 TBN
3.9 3.7 3.3 3.7 TAN
5W-20 0W-20 0W-20 5W-20
MOBIL ENEOS MOBIL
Technician comments from last several reports:
5W-20: "Small amounts of fuel (1.0%) seem to want to show up often; it's really not harmful, and it's not hurting anything that we can see. It's not even diluting the viscosity (usually fuel thins the oil out). Some engines do routinely leave a little fuel in the oil, and it's not a problem. Anyway, at 183,000 miles, this engine is wearing beautifully, and no other contaminants turned up. The TBN and TAN are 4.4 and 3.9 respectively. Nice engine!"
0W-20: "Wear continues to be steady in this third sample of the series, and now there's not even any fuel dilution to talk about (0.1%) -- which is terrific! The TBN read 4.6, and the TAN is 3.7. The low silicon and insolubles readings show excellent air and oil filtration -- this is what we refer to as a perfect sample (and deservedly so). Nice!"
ENEOS: "After the same oil use interval, about the same amount of metal turned up, and that's exactly what we like to see -- steady wear. Fuel improved to just a trace, you really shouldn't waste a moment worrying about the trace that turned up here. The TBN and TAN are fine at 4.4 and 3.3 respectively, and no coolant, moisture, or abrasive dirt contamination was found. For the most part, wear is below the universal averages for this type of
engine, but averages are based on a longer 8,600-mile interval, so that's probably a big reason for these
lower numbers."
I love good news.