Quote:
Originally Posted by gmcvt
I do run E85 exclusively and my catch can is always full of a homologation of something between what appears to be milky oil and possibly some corn.
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Ahhh E85. That's it. Burning alcohol can make acids. So this is almost certainly the culprit here. You will have to change oil more frequently. I recommend changing the oil when the OLM says 50% or 3k miles, whichever comes first. Keep doing the TBN analysis and let that be your guide. Winter will be worse than summer.
Your catch can will fill with water and light hydrocarbon condensates very quickly in the winter (like weekly if your trips are frequent and short). E85 adds to this. Chocolate milk shake appearance is normal in the winter. Will be darker in the summer as higher temps cause water to evaporate/burn off. Analysis shows no water in the oil so your CC is doing its job.
