Thinner than a OW
- Thread starter kurthb
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I believe those are measured using ISO rating.
P.S. On unrelated note - some people still believe that 75W-90 Gear oil is waaay thicker than 5w40/15w40 motor oils and add it to their crankcase to "thicken it up". Some interesting things you can hear at a truck stop
. And no, none of my facts/reasons of it being wrong changed that trucker's mind, as he was doing it for 30 years now and wasn't gonna stop. "I only had 2 rebuilds on that engine" he told me, but couldn't tell how many engines he had before that one.
P.S. On unrelated note - some people still believe that 75W-90 Gear oil is waaay thicker than 5w40/15w40 motor oils and add it to their crankcase to "thicken it up". Some interesting things you can hear at a truck stop
. And no, none of my facts/reasons of it being wrong changed that trucker's mind, as he was doing it for 30 years now and wasn't gonna stop. "I only had 2 rebuilds on that engine" he told me, but couldn't tell how many engines he had before that one.
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Ding ding the correct answer. The winter rating is a performance specification, more misunderstanding about what it is and what it is not.
It could be if it was a "thick" 90 weight.
There is some confusion here as there have been - and likely still are - sparsely marketed Mono Grade, Winter rated HD oils.(not to be confused with multigrade W rated oils) These oils are de-waxed as to provide adequate winter performance and pumpability. Their viscosity range is clearly shown on the SAE J-300 ca2015 spec
We don't see them as I wouldn't think any new machine would spec them, or allow them other than environmentally exposed hydraulic systems and hydraulic dampers. - Ken
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