Amsoil 0w30 17,400 miles Ford Explorer 4.0 SOHC

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The data shown below is from my '99 Ford Explorer 4.0 SOHC using Amsoil Bypass filtration ( http://www.explorerforum.com/forums/...ghlight=bypass ). The oil used is Amsoil Series 2000 0W30 ( https://www.amsoil.com/storefront/tso.aspx ). The mileage on this oil sample is 17,400 miles. The oil is 1 year old.

Neither the full flow filter ( Amsoil EAO-15 [ https://www.amsoil.com/storefront/eao.aspx ] ) nor the bypass filter ( Amsoil EABP-90 [ https://www.amsoil.com/storefront/eabp.aspx ] ) was changed at this sample interval nor was any makeup oil added ( I have never added any makeup oil to this motor ).

As an experiment, LCD, Inc.’s ( http://www.lubecontrol.com/ ) LC20 (http://www.lubecontrol.com/lube.htm ) was used during this entire test. The usage was as follows: 1 oz/qt of oil for the initial dose, and then 1 oz every 1,000 miles. The appropriate amount of crankcase oil was removed when the LC20 was added to maintain the proper fill level.

Blackstone Labs ( http://www.blackstone-labs.com/index.html ) performed the UOA. I have used them for years.

The first number is the current sample data, and the last represents Blackstone’s average of data collected for this type motor.

Aluminum 6 6
Chromium 1 1
Iron 24 24
Copper 9 10
Lead 3 6
Tin 0 1
Zinc 785 975
Molybdenum 10 9
Nickel 1 1
Manganese 0 0
Silver 0 0
Titanium 0 0
Potassium 1 1
Boron 7 16
Silicon 16 12
Sodium 10 4
Calcium 2834 2142
Magnesium 98 532
Phosphorus 645 792
Zinc 785 975
Barium 0 0


TBN 1.8

Viscosity @ 210 degrees F: 4.8 Typical Amsoil 0W-30: 56-64
Flashpoint in degrees F 410 >375
Typical Amsoil 0W-30: >365
Fuel % Antifreeze % 0.0
Water % 0.0
Insolubles % 0.3

Blackstone's comments: AL: Nothing much changed in this sample from the last. Wear improved a little, as this oil hasn't been run as long as the last. As nicely as this engine wears you shouldn't have a problem getting another few thousand miles out of this fill of Amsoil. We suggest resampling at the 21K-22K mile mark to keep an eye on wear. The TBN read 1.8 so you have enough active additive to make it to that mark but not much past. No fuel, coolant, or moisture was found and the air and oil filters are working well. This has to be one of the nicest wearing 4.0L we've seen this year!

Furthe, I see no reason to continue using LC20; it did nothing for me ( as compared to the last UOA ).
 
Quote:


Furthe, I see no reason to continue using LC20; it did nothing for me ( as compared to the last UOA ).




Not surprised. I would make sure you continue to use the bypass filter and I would also run some AutoRx instead of the LC to avoid any sludge. Running an oil that long can be very risky. Looks good otherwise.
 
Given the TBN, I'd drain this oil after 20,000 miles and install a new EAO full flow filter. The bypass filter should still be working fine, so there's no reason to change that out.

The main advantages I've seen from using bypass filters is that they keep the total solids levels in check, which helps prevent the oil from thickening over very long drain intervals. In addition the extra sump capacity lowers the thermal/oxidative stress on the oil, so it simply lasts longer.
 
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