I need to change the transmission and differential oil in my 2021 Crosstrek with a 6 speed manual transmission. It looks like Redline 75w90NS is the fluid to use for the transmission.
Since the Crosstrek has an open rear differential, would the 75w90NS be a better fluid than their regular 75W90 gear oil for the rear differential? Is there any advantage to using their regular 75w90 with anti slip additives or would the "NS" version provide better lubrication?
Since the Crosstrek has an open rear differential, would the 75w90NS be a better fluid than their regular 75W90 gear oil for the rear differential? Is there any advantage to using their regular 75w90 with anti slip additives or would the "NS" version provide better lubrication?