So i have always used redline or amsoild in my cars and has loved the way they shifted. I was wondering if these are good to use in my 08 gsr or if i should stick to the diaqueen factory fluid.

 

using amsoil is fine.

 

i agree, using AMSOIL is fine.

 

Redline here; mix 2xMTL & 1xMT90 for the proper factory spec viscosity. Or you could try the new MT85 instead of mixing the cocktailX as we call it.

 

ive used both and the Redline cocktail works better IMO.
Smoother shifts, doesn't break down as quickly.

 

and your data is where?

also, I think anyone who claims smoother shifts suffers from the placebo effect, regardless of what they filled their gearbox with.

 

He's stating his opinion which the Amsoil fanboys do plenty of so relax.

If you think it's all placebo affect then you're in a very small minority. I hated my stock transmission feel from the second I drove it off the dealers lot. I changed the fluid almost immediately and noticed a significant change in shifter feel. I can assure you, I wasn't so excited to spend $30 on fluid that I convinced myself it was better

 

yes the spec of this oil MTG GL4 exceeds in all aspecs the diaqueen, and this data is documented. your tranny/pocket will thank you in the long run by using premium synthetics

 

I used the Redline MT-90 and worked like a charm!

 

redline mt85 at 2000 miles.

shifts much smoother.

 

1- a statement like "doesn't break down as quickly" implies knowledge of some sort of empirical quantitative data no matter how you cut it.

2- as far as shifting... I'll retract/clarify a bit: most people probably feel a difference, but it is likely more attributable to new vs. old fluid than it is brand vs. brand. in your case of perceived difference on a relatively fresh fill, don't forget that the initial 500 miles on a fresh transmission probably contaminates the oil more than the subsequent 50k.

if anyone honestly thinks they can blindly tell the difference in shift feel between a fresh fill of oe/amsoil/redline on a broken-in transmission, please let me know: I'll be happy to change your transmission oil with each respective fluid and buy the fluids themselves if you are able to identify all 3 correctly :P

 

put in amsoil a couple months before our first snow hit. engaged pretty smoothly. no complaints.
first big snow went out and romped for a couple days. low speed + high revs = high trans temps. i could tell the difference in smoothness of shifting as soon as the first evening.
I replaced the amsoil shortly there after. fluid was clean, no trans damage.
Put the redline cocktail in, tranny engaged a little more smoothly than the amsoil when i first put it in only a month prior. we had a bunch more snow days, beat on it much more with no change in smoothness or adverse effects. when it was time for a change, redline was clean with no trans damage either.

I have been flogging my honda on track for a few years now and can tell when its time for trans fluid change. I would say my scenario, in addition to my little bit of real world knowledge gives my comment some credibility. I was just giving the OP my personal experience to help aid in his decision. I changed fluids within merely a month each other; tactile memory was still fresh, no placebo effect here.

EDIT: i should mention this is in an 8. i didn't even notice i was in the X forums.
I'll also note that the amsoil would engage more easily on an ice cold gear box in the mornings. with the redline I have a bit harder time getting the gears engaged first thing in the morning in temps anywhere in the 30's.

 

I changed the Diaqueen @ 15 and 30k miles. Didn't notice a difference between old and fresh Diaqueen. Switched to Amsoil around 40k, and did notice improvement. It is still a little notchy when cold, but MUCH better when warm, especially noticeable on the 2nd to 3rd shift at lower rpms. Have not tried redline, but I am convinced the fluid can make a difference in these trannies.

 

What Amsoil is recommend for the manual trans in these cars? On my GTO 6 speed man. it runs Amsoil Automatic trans fluid. I have run redline and B&G in my DSM and I like the redline cocktail, but Id like to try Amsoil in the Evo. Thanks
Mike

 

MTG https://www.amsoil.com/storefront/mtg.aspx