2002 Tundra; 2UZ-FE; 180K motor; 4.5K oil; Citgo

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Jul 26, 2004
New Bri-en, CT
Here is one from a while back


Oil is 5W-30 Citgo Supergard Semisyn (i think)

Al 2
Cr 0
Fe 4
Pb 13
Sn 1
Moly 35
Ni 1
Mn,Ag,Ti,K 0
Boron 1
Na 118
Ca 2323
Mg 13
P 697
Zn 838
Barium 0
SUS @ 210F 57.8
cSt @100C 9.59
Flash 440F
Fuel < .5%
Glycol ?
H20 0
Insol .2 (L10241 or some such quality filter lol)
TBN 4.3


Sodium increased a lot in this sample, but we think that's just due to the change in oil type, not a sign of coolant contamination. The Mobil 1 you were using before didn't have sodium as an additive, but this Citgo oil might; we haven't seen a virgin sample of this type of oil recently, but if you want to send us one, we'll check it for free to compare. Calcium and magnesium changed quite a bit since last time, and those are additives too. Metals are holding pretty steady -- you've still got high lead, but no worse than before -- and the TBN is good at 4.3. Overall, good!

Not sure about Citgo Oil having Na. PQIA doesn't indicate that. I have a bunch of SN purchased over several years, I don't know if I put 'new or old' SN in.

I'm suspecting it must be in the oil, since any glycol probably wouldn't have returned iron #s that low? What say the gallery?

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They offered to test a virgin sample, if you have lots of it you might as well take them up on their offer to see if it uses sodium and add it to the database.
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