I found this products:
for the GL 5
https://www.walmart.ca/en/ip/Red-Lin...RD3B3NUJ4OQA11
and this for GL 4
https://www.walmart.ca/en/ip/Red-Lin...RD2PWRN318YUK8
Redline has both oils spec, I do not hear too much about this brand, is it a reputable brand?