On 8/18/17 10:53 PM, Bram van den Heuvel wrote:
What's so special about GL4 manual transmission gear oil that it's 70 bucks
a gallon?
https://www.redlineoil.com/product.aspx?pid=46&pcid=7

Have you checked Amazon, NAPA, or farm supply stores like Tractor
Supply,
Rural King, or Orscheln? The first one that pops up at Amazon is $35.