are all 15-40's considered HD?

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just wondering i bought some of the wally supertech stuff and it made no reference of it being HD....
 
Does it say CG-4 or CH-4 on the bottle? If it does then it should be a HDEO.
 
Quote:


In the US, if it's a 15W40, it's a diesel oil. For heavy car oils, we use straight weights or 20W50.




Wasn't aware of that.

15W-40 has been available down here for about a decade in PCMO formulations, as a step down from our traditional 20W-50s.

The highest diesel ratings on most of them is CF.
 
Quote:


Quote:


In the US, if it's a 15W40, it's a diesel oil. For heavy car oils, we use straight weights or 20W50.




Wasn't aware of that.

15W-40 has been available down here for about a decade in PCMO formulations, as a step down from our traditional 20W-50s.

The highest diesel ratings on most of them is CF.





Thick oil, giant v-8s..... Please send me a plane ticket
cheers.gif
 
We had a lot of really hot sixes as well (including in the early 70s a Chrysler 265c.i. that did 14.1, and got 224KW)...I liked my sixes.
 
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