Toyota 0w-20 SM, 8,531 km, 2010 RAV4 4-cyl

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This is my second UOA. The first one http://www.bobistheoilguy.com/forums/ubb...rue#Post2467679 indicated a problem with air filtration. Although I checked the intake system I could not find a leak. The air filter was replaced prior to the last oil change. My driving is typically 90% highway, 10% city. We had a mild winter in Calgary – I believe the coldest day I drove was -25C for this interval. I don’t typically commute in my car so it doesn’t see a lot of stop-and-go traffic. Ramatek has done both analyses. I use a magnetic oil drain plug. When I changed the oil the magnet was fairly clean; the magnet was noticeably dirtier the previous oil change when the iron levels were higher so there seems to be come correlation. I’ve noticed on VOAs for Toyota 0w-20 the silicon is typically 5-8 ppm which tends to make the silicon in the UOA look a bit less bad (but not good). I suspect my next UOA should show slightly lower iron due to incomplete removal of oil during an oil change. I searched BITOG and did not see any other UOAs on this motor (2AR-FE). Maybe the most recent oil change iron levels are normal for this engine. Oil fill is more Toyota 0w-20 SM. I have enough for 2 more changes then will switch to the Toyota 0w-20 flavour du jour unless there becomes another reliable source for 0w-20 in Canada.
Code:
km on oil	8531	        6762
km on unit	70093	        61020
Sample Date	2012-03-03	2011-12-15
			
Ag		0	        0
Cu		0	        0
Pb		0	        0
Fe		16	        33
Cr		1	        0
Na		0	        0
B		0	        0
Al		3	        5
Si		26	        25
Zn		1055	        1083
Sn		6	        0
Ni		0	        0
P		1235	        1156
Ca		2170	        2910
			
Viscosity	7.4	        7.4
Fuel Dilution	0	        0
Insolubles	0.1	        0.1
Water		0	        0
TBN		3.5	        5.6
Oxidation	0	        0
Antifreeze	0	        0
Ian
 
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That looks pretty off, Zn and P are both over SM limits. And no moly? That is this oil's claim to fame. I'd try a different lab.
 

IanInCalgary

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Feb 22, 2011
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47
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Alberta
I added the magnet to a stock drain plug by drilling a shallow hole in the end of the drain plug, then putting the magnet in the hole. I've used different magnets depending on the amount of space available at the end of the plug. For a small plug I use a Bucky ball. For a larger plug I use small cylindrical magnets that I bought at Princess Auto (similar to Harbor Freight). Ian
Originally Posted By: firefighter0629
magnetic oil drain plug, where did you order it from?
 
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