Amsoil ASL 5W30 5700 mi. 4.6L DOHC Ford

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Nov 27, 2003
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Puyallup, Wa
This is my first UOA on this car. I think the copper and silicon are from a cylinder head replacement at 16,200 mi. The cylinder head replacement was due to bad valve guides. I have a BMK-13 DR By-Pass system with SDF15 and BE90 filters. The SDF15 was put on at 16,200, but I left the by-pass on from 10,955 mi.

History: I ran factory fill 5W20 until 1,200 mi, switched to Amsoil 0W30, changed it at 7,200. Changed again at 9,700. Added by-pass system at 10,955. Cylinder head was replaced at 15,655 mi., which they filled back up with 5W20, which stayed in until 16,200. Amsoil 5W30 ASL added at that point. That enough history for ya.

4.6 DOHC 2003 Marauder, 22,000 miles on car, 5700 miles on oil.
Amsoil 5W-30 ASL & SDF15 Full Flow, BE90 By-Pass
Alum 4
Chromium 1
Iron 22
Copper 62
Lead 3
Tin 1
Molybdenum 0
Nickel 1
Manganese 0
Silver 0
Titanium 0
Potassium 0
Boron 19
Silicon 110
Sodium 10
Calcium 2616
Magnesium 704
Phosphorus 858
Zinc 1264
Barium 3
Sus Viscosity @ 210 was 64.2, should be 56-68
Flashpoint was 405, should be >365
Fuel was Antifreeze was 0, should be 0
Water was 0, should be 0
Insolubles were 0.3, should be TBN: 4.2

Blackstone says: Copper read high in this initial sample from your engine. It can come from poor wearing brass or bronze parts, or from wear-in if you haven't changed the oil very ofter since the engine was new. All other wear looked good. It may also be from an after market air filter, if you are using any. Silicon was also high & can show dirt getting past the air filter, so we sugesst checking that. Again, you haven't changed the oil that much, Silicon could be from wear-in. The TBN read 4.2, so the oil still has plenty of life left. Insoluables were low, showing good filtration.

My take: I think the high copper and silicon were from the cylider head replacement. I made sure everything was sealed tight when I replaced the stock paper filter. Based on the copper, which Blackstone says could come from brass or bronze......hummmmm, valve guides breaking in maybe. Any input would be appreciated.
 
I can understand your silicon and copper being high if it is from assembly lube and gasket material. Though both seem to be high compared new Ford factory vehicles. However, your lead and iron do seem to be high for a 4.6. Though in all honesty I'm not familiar with the DOHC 4.6, only the SOHC 4.6. I understood that bad/failing valve guides gave off high nickel readings over 1 in the UOA. It will be interesting to see your next UOA to see how the possible new/assembly numbers sort themselves out.

Whimsey
 
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