oil shelf life?

Originally Posted by tranceformer

I've never tried any Royal Purple products in any of the cars I've owned.

I have used Redline MT-90 in my first car, it made a HUGE difference in shifting. At the time the synchros were a bit worn, especially 1st to 2nd gear. Then again at the time it was a 10 year old car that probably hasn't seen an transmission oil change in 5+ years. Either way I was really happy with it.

I've tried Redline lightweight shockproof gear oil in my 350z, great stuff. Shifting improved at all temperatures, hot or cold.