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YOUR RESEARCHhigh sodium in oil analysis - opinions?
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Use mobil 1 0-40w
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Suggestion
You can also inspect sparkplug coloration for variances.
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I recently received an oil report from Blackstone showing Sodium at 106 ppm. This on Castrol Syntec 5/50 with 1850 miles of use. 55k on the car and all other element numbers seem good.
What do you all think?
+100. IMHO, you paid them to conduct the analysis, would be nice of them to also provide possible reasons why.
according to BITOG (found via GOOGLE): LINKY>>>>
http://www.bobistheoilguy.com/engine-oil-analysis/
Sodium: This is most commonly used as a corrosion inhibiter additive, and
occasionally can indicate a coolant leak into the oil
. Concentration levels vary greatly depending on oil brand.
Sodium
in oil analysis 2003 996
41k mi
143
using mobil 1 0-40 3k on oil. Dealer used ?? on change before this. So something else is mixed with the Mobil 1.
45k mi
45
mobil 1 0-40 4.3k mi oil
50k mi
19
mobil 1 0-40 5k on oil
BMW R1100RT Aircooled Motorcycle
29k mi
423
Brad Penn 20-50
Mercedes ML350
54 k mi
5
mobil 1 10- 40
60k mi
26
mobil 1 10- 40
Looks like Dino oil has more sodium. Any chance that some was added? Are you using full synthetic?
Coolant getting into the oil possibly thru a cracked head. Monitor your coolant level closely & don't top off the level, wait for the warning light to come on to better keep track of the total loss. You can also inspect sparkplug coloration for variances.
Being that the car is an '01 and the inherent issues that we have with 01's being cracked heads I'd say that you might have caught this very, very early. That sodium level is horrendous.
Of course, I have been wrong in the past and so has Blackstone.. I'd take it super seriously and send in another sample for a second opinion from another lab. If you have an issue impending it won't take long to see the elevated levels of sodium in the second sample.
Could indicate a coolant leak, but you'd need to know if sodium is part of the additive package in your specific oil.
Potassium is also an indicator of a coolant leak and is rarely part of an ad-pak. If your potassium is high as well then you should be worried.
Not that it matters for warranty purposes but, Unlike Mobil 1 5w-50, Castrol Syntec 5w-50 is not a porsche approved oil. All that aside, the 5w-50 syntec was created for older muscle/classic cars and has a higher zinc content. Sounds like you should look into the cracked head senario. Has you coolant level changed recently?
http://www.castrol.com/castrol/gener...tentId=7032644
Thanks for all the input. My potassium was at 2 and water % was at 0.0. I am going to send samples to Blackstone and also to another lab next week. It obviously be would be nice if my sodium number comes down like yours did fpb111, but we'll see. I have switched oil to Joe Gibbs DT540. I will post the results for the new tests.
J
I sent off another oil sample to Blackstone Labs after 510 miles on the new Joe Gibbs DT40 oil. The results came back today showing sodium at only 24. This seems to indicate that the previous sodium reading of 106 ppm was residual additive from the prior oil, which I found out had an original sodium number of 490 ppm. I also spoke to an oil analyst from a different lab that said Potassium would likely be high as well in a coolant leak scenario. The previous potassium showed 2 ppm and this sample showed 0 ppm.
I haven't sent a sample off to another lab yet. I thought I would I put a few more miles on this oil. These details are encouraging.
