my neighbor works for redline oil, and he wants to help me out for my car.. my car is stock but it has dynoed 264whp/248tq on a dynapack. i have an 04 enthusiasts with a manual gearbox and vlsd. what oil should i use for my rear-end, transmission, and motor ... i was considering to change down from 5w-30 to 5w-20... i have somewhat made an effort for a search .. thanks

 

What I use,

Motor: 5w30
Tranny: 50/50 mix of MTL and MT-90
Diff: 75w90

 

usually how much should I ask him for... the tranny and diff fluid?

 

for tranny, get two each of MTL and MT-90 and mix; it takes about 3.25 qts to fill. For diff, it takes a little over two quarts.

 

So has changing the fluid made the tranny smoother or anything? Ive heard lots of mixed opinions.

 

From the service manual. Note the diff is in pints, so a little over one quart needed

 

Yeah, I went by the manual when I bought my fluids (I used RP). I had to go back to the store to buy another quart; the diff. holds more than the manual states.

 

I used RP in my tranny and diff and there is a noticable difference; the shifting is much smoother. Mmm... feels like butter. Some say the shifting is notchier when cold and smoother when warm, but I haven't noticed it being any notchier than it was before for the first few miles and once it warms up, shifting is a pure joy.

 

well i will be also doing a clutch upgrade on my car also... any recommendations from my felow 350z-er's?

 

Don't have it, but always read that the JWT is trhe best bang for the buck. Get the lightweight flywheel (they sell thje clutch/flywheel combo) and do them both at once; the flywheel is where you'll notice a performance improvement.

 

WTF 264 WHP completely stock, now thats not bad at all, damn! I also am mixing redline tranny fluid, good stuff. Your friend should hook you up with lots of motor oil, redline's like $9 a quart.

 

im planning on running 15w-40 , because after reading other threads, i have been monitoring my oil pressure after hard runs and my oil pressure drops to 10-15 psi.... would anybody else agree about oil presure drops?

 

Running 15w-40 will raise your oil pressure but likely reduce the oil flow volume, which is basically just as bad as low pressure.

Also, are the pressures you're quoting at idle? That isn't a terrible hot idle oil pressure. Run it up to 2000rpm and see what it goes up to.

 

i will return to the track wednesday and update you guys how my oil is. okay.. thanks for your opinions and insights . and the dyno with 264hp/248tq was a fifth gear pull and i had 1400 miles on my car. i ran the gas tank empty and added an octane booster.. so please dont be too surprised the NOS additive might have worked.