Reply To: Wally mart GL5 90 grade oil ok??

Home › Forum › Ask A Member › Wally mart GL5 90 grade oil ok?? › Reply To: Wally mart GL5 90 grade oil ok??

July 23, 2023 at 9:27 am #278394
JOSEPH BRINCAT
Participant

    US MEMBER PAY BY CHECK

    My understanding is that GL3 or GL4 is OK for contact with “yellow” metal parts. GL 5 is not because of the sulfur compounds.  I use the commonly available GL4

    Joe B