Is this a thick/thin 5W30?

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quote:
Originally posted by sprintman: cSt @ 40C 70.11 cSt @ 100C 11.05 HTHS @ 150C 3.23 VI 145 TBN 6.2 (ASTM D-2896) Flash 221 Pour -42C
A little on the "thick" side. Mobil 1 5w30 is around 9.8 cSt @ 100°C. I'm surprised the HT/HS isn't better, though. Mobil 1 10w30 and 5w30 are both thinner than this oil at 100°C, yet their HT/HS numbers are about the same: 3.2. This is not an A3 rated oil, that's for sure. What is it?
 
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quote:
Originally posted by sprintman: Lubrication Engineers 8530 Monolec SPB 5W30, which I'm considering trying in my Sube Outback with RX maint dose. Looks OK I thought for a blend?
I suspect this oil is going to shear (possibly out of grade) rather rapidly. I hope you'll do a UOA and post it. The results should be interesting.
 
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Wasn't there some speculation, though, that a lower VI tended to correspond to a lesser amount of VIIs, thereby potentially allowing for greater shear stability? Or do I have that backwards?
 
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quote:
Originally posted by YZF150: Wasn't there some speculation, though, that a lower VI tended to correspond to a lesser amount of VIIs, thereby potentially allowing for greater shear stability? Or do I have that backwards?
That is my theory, but it only pertains to fully synthetic (PAO/ester) oils. Not conventionals, and not blends.
 

sprintman

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Just spoke to LE and 5W30 not imported. 10W30 Monolec Ultra-Blend is but A$90 for 5-litres. Hmmm BP Visco 5000 5W40 PAO is only A$129 for 20-litre drum, I'm having second thoughts.
 
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