Correct. Just like the other cold climate oils.
HPL 15w40 cold climate oil PDS
- Thread starter mattd
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Which clearly doesn’t yield a superior winter rating. We’ve seen this before on here.
There is a reason the winter rating is a better metric of cold weather performance than pour point.
Correct. Which is why I’m going to stick with the 5w40. I was mainly curious about it cold temperature performance.
Yes but ccs is clearly better in every cold climate oil
How?
Can you provide a source for this? The charts I have seen, show 14F as the low point. Thanks
The context of that post was pull start engines. Around 0f with a 15w they're impossible to pull start.
For drop dead cold cranking temperature I say never go thicker than 16,000cp for your w rating and temperature combo. I saw a jeep service bulletin posted on here a while ago, which jeep and what years or engine I don't know because I avoid and don't care about jeeps. The jist of it said if you start that jeep with the wrong oil at too cold of a tempature firing the engine snaps the oil pump drive and you're sol. Jeep had a bunch of w ratings and minimum temperature recommendations listed too many to remember so I looked up what the viscosity actually was for the w rating plus the jeep recommend temperature and they all hit about 16,000cp. Most engines can pump 20 to 30 thousand cp oil no problem and the cut off is due to lack of oil pressure for extended time from pump cavitation. I figure if you make the cut off 16,000cp for everything then you'll never damage your engine, probably.
Pour point is like 60,000cp so not a great measure of cold starting performance.
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Pour point of -56 is impressive for sure but kinda meaningless.
Amsoil 15w40 DME has a pour point of -40. It's CCS at -20 is 4000
HPL has a pour point of -56 but a CCS of 4300 at -20.
So the amsoil flows better even though the pour point is higher.
Amsoil 15w40 DME has a pour point of -40. It's CCS at -20 is 4000
HPL has a pour point of -56 but a CCS of 4300 at -20.
So the amsoil flows better even though the pour point is higher.
Yes, as I noted above the pour point of an oil is not a reliable indicator of winter performance. This was shown true 40 years ago.
Flow isn't really the issue. It's about cranking and pumpability.
I have two unopened 20L pails of cold climate 15W40 Petro-Can Duron called 10W40.
And a few jugs of cold climate 10W40 called 5w40.
And over half a pail of cold climate 5w40 labeled 0W40 Rotella T6.
And a few jugs of cold climate 10W40 called 5w40.
And over half a pail of cold climate 5w40 labeled 0W40 Rotella T6.
