AndyH
Well-known member
Thanks for posting the report! What oil is in the engine? I assume it's the initial/factory fill?STS134 said:Woodman411 said:STS134 said:I've attached my oil analysis report (they got the vehicle type wrong, it's the PHEV model, but that doesn't affect the analysis) which was taken at 3714 miles. As you can see, fuel dilution was already at the maximum level allowed. Fuel in the oil is a really bad thing, it prevents oil from properly lubricating the ICE. Fuel in the oil is a common problem in PHEVs because the ICE tends to not run long enough to burn off the blow-by, so instead of burning off, the fuel in the oil builds up. This oil needs to be removed from my PHEV soon, and I will remove it at 5k miles.
Thanks for posting this, excellent information.
I should add that the oil that came out of my PHEV had a strong gasoline-like smell when I was putting it into the sample container. I have never smelled anything like this coming out of any of my pure ICE cars. But you can't just sniff test your oil, you really need to send it in to be analyzed to figure out the actual contamination levels.
Here is the place that will do oil analysis, at least if you are in the US: https://www.blackstone-labs.com/
They sell a vacuum pump, which you can use to extract oil without actually changing it https://www.blackstone-labs.com/vacuum-pump.php That's how I got my oil out to sample without removing all of the oil from the vehicle.
The TBN levels https://www.blackstone-labs.com/do-i-need-a-tbn.php still look good, as this ICE really has only about I'd say 1000-2000 miles of "runtime" on it, but it doesn't really matter as the fuel dilution has reached levels where the ICE can be damaged anyway.
I'll be pulling a sample on mine next month to confirm my annual oil change plan (I use AMSOIL).
The fuel dilution number might shift if one runs the engine enough to get the oil up to temperature for about 30 minutes. That should help with both dilution and keeping water at bay. But viscosity is still within the normal range, so no worries about the small amount of fuel dilution at this point.
Don't worry about the TBN for gasoline engines - that's a diesel engine oil life marker. Keep track of TAN for gas engines. (Though yeah, if it's what you've got, use it - and it looks fine.)