Which one should I get and where can I order it? No shops around here sell it.wRxOne said:There is no explanation in that article why not to use it? Also I think they're mentioning no to use RedLine's 75W90 formula, I tried that along with 75W90NS and a combo of both. It didn't help the grinding. I changed my oil at about 10K and don't have any problems as I did prior to the Manual Tranny fluid change. I'm only speaking from experience and with the way I drive, sometimes, I'm glad I made the switch.