Mobil 1 vs. Eneos 0W-20 5W-20 -- Honda Insight 1.0

Messages
479
Location
MN, CA
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. wink smile laugh
 

veryHeavy

Thread starter
Messages
479
Location
MN, CA
Originally Posted By: CT8
It seems that both oils keep the parts separated.
Amazing isn't it? After all the comments about Eneos being a "wonder oil" I thought it would perform better than Mobil, but I see no difference.
 

4WD

Messages
15,108
Location
Texas
... And another 4 to 5 at Walmart that would do just as good - one of the main reasons I don't pay for UOA's is I can read them here - and see how close these lubes really are. And ignore minor differences knowing "lesser" oils (than the 2 in question) take vehicles so far the wheels fall off before the engine gives up.
 

veryHeavy

Thread starter
Messages
479
Location
MN, CA
Originally Posted By: 4WD
the wheels fall off before the engine gives up.
You're right about the Car failing before the engine. This particular car has pieces of plastic falling off the body (aerodynamic pieces which are not really needed). It's obvious the engine will still be running great when the Car is no longer able to move.
 

veryHeavy

Thread starter
Messages
479
Location
MN, CA
Did I run these oils too long? I notice the TAN in the far-right sample is almost identical to the TBN. I assume if TAN >> TBN == bad.
 
Messages
436
Location
Indianapolis, IN
Originally Posted By: veryHeavy
Did I run these oils too long? I notice the TAN in the far-right sample is almost identical to the TBN. I assume if TAN >> TBN == bad.
I wouldn't say these are too long because TBN is still greater than TAN. It's tough to predict just how much longer you could go because the numbers aren't linear with miles. From my past engine development days, one of the limits was that when TAN = TBN it's time to change the oil, no matter how high the TBN still is.
 
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