Hi all, I have an '01 Sentra SE manual tranny. It's my understanding it has an LSD, but what type of LSD I'm not sure. The manual calls for 75W90 GL4. I've read so much and just about every lube I read about seems to have some downside or a user who claimed trouble with it. Hard to verify on the net, but it gives me pause. I figure I would be safest to just go with the Nissan product, but I've only ever found it in 75W85, which I find odd. I've heard the Nissan is made by Castrol and is their Syntorq or SMX-S, but both those seem to only come in 75W85. I think their 75W90 product is a GL5 product. I was going to go with Redline MT-90, but I heard it was eating some plastic bearing parts in Mazda's, but I can't verify and not sure if the Nissan hase similar parts or not. Why would the Nissan oil be so unavailable? Anyone know where I could get it? Would the 75W85 be ok to use or not offer enough protection? Some people recommend an MTL and MT-90 mix, wouldn't that be close to 75W85 anyhow? I ask because someone told me to not use the Nissan 75W85 yet recommended a Redline mix, seems odd to me. Your thoughts appreciated as I don't know what to do.