By Heather Burlingame, Senior Production Editor | September 28, 2010

DuratranBilled as the first full-synthetic transmission/hydraulic fluid (THF), Duratran provides enough temperature protection to eliminate the need for seasonal change-outs. Fluid operating temperatures range from -42 to 194F. The manufacturer's purity process creates 99.9 percent pure base oils. This allows the fluid to retain its fresh-oil properties longer than oils with more impurities. If parts are damaged due to fluid defects, a warranty guarantees repair or replacement.