HM high moly&boron oil

Joined
Oct 1, 2022
Messages
15
Is there a 15w40 diesel engine oil with all 3 that have a high content of Zinc , boron and Moly ?
 
Joined
May 25, 2005
Messages
974
Location
Arizona
I like QSFS (QSUD?) because it's a decent oil AND is one of the least expensive oils I can get for my vehicles. (Used to be Supertech).

Having said that.... I have no idea how some of you guys are "hearing" an oil runs "quieter". ????? Seeing that this site thrives on "Data".... I'm wondering how one goes about listening for this type of thing?? Do you use a decibel meter?

Seems overly subjective to me.
 
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