Amsoil EFO 0w40 Euro Oil

Would you say that flashpoint is not an accurate indication of whether or not there's fuel contamination?
If VOA flashpoint is 455f and my sample reads 430f, can't be much fuel in there, me thinks.
It's never accurate and the ASTM test indicates it should be used only for screening purposes. Even then, flash point measurement has a low reproducibility compared to other property measurements and when another property is estimated off of this inherently imprecise value you get the problem with this method.

Plus we have just seen various results from them to be inaccurate, not just flash point. If you want an accurate fuel dilution measurement you won't get it unless it is measured directly.

Mechanical shear of the VM is something that is blamed on here quite often when in reality there is no definitive determination that it exists. Without accurate fuel measurements one has no idea why there is a viscosity deviation. Fuel dilution is far more common a cause. One can eliminate VM mechanical shear if you use a no-VII oil.
 
@scrllock here are just my data including track use, I went back to my notes and cleaned this up a bit. The one thing to keep in mind on those earlier track day changes with low iron numbers on regular ol' oils is that I was a n00b and driving on all seasons just getting my feet wet on the track. 12/20 oil change - first time on track, 1 actual day (4x24 min sessions that event due to some brake issues [street pads]). Hard to compare that to 8 days of more advanced skill level driving this year driving where I'm now pushing it at a decent clip. As someone said, my data are a bit challenging b/c lots going on/not consistent/layers of things that both increase/decrease the results but it's what I have. I'd wager than the HPL will look better back to back with all other variables constant vs. either of the Liquimoly oils sitting on my work bench ready for changes in my other vehicles coming up.

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yeah, i just can't draw a conclusion from that data given the leaks and engine work. lot of contamination going on. driving style changed. etc.

Would you say that flashpoint is not an accurate indication of whether or not there's fuel contamination?
If VOA flashpoint is 455f and my sample reads 430f, can't be much fuel in there, me thinks.
Note: I'm using a catch can that just collects water, so far.
BS uses cleveland open cup and kschachn mentioned some of the issues with that. my understanding is that even blackstone says it's not accurate at >10% dilution, plus it is not a good test for hygroscopic fuels like ethanol.

Many cases of BS UOAs showing <2% fuel compared to gas chromatography showing much higher rates. On a tuned turbo GDI motor running e85, I'd be very skeptical of a <0.5% result.
 
yeah, i just can't draw a conclusion from that data given the leaks and engine work. lot of contamination going on. driving style changed. etc.


BS uses cleveland open cup and kschachn mentioned some of the issues with that. my understanding is that even blackstone says it's not accurate at >10% dilution, plus it is not a good test for hygroscopic fuels like ethanol.

Many cases of BS UOAs showing <2% fuel compared to gas chromatography showing much higher rates. On a tuned turbo GDI motor running e85, I'd be very skeptical of a <0.5% result.
We'll see the how next run looks - I'll pull a sample after the next time at VIR, should be in either March or May (and likely a few autoX) depending on which I do..May is 3 days with a TT, March 2 and weather at VIR is shifty in March so likely won't decided until the last minute. Should be 4-5K miles at that point. I just find the data thing interesting but I'm a scientist so go figure.
 
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