[bulldog_yyc]

Originally Posted by Mr. 5

OK guys, I really thought that the RP felt good but this Redline kicks the crap out of it IMO.
The nothiness is gone.
The shifts are like butter, no matter what temp it is. Now remember that I live in SoCal so it won't be as cold as other parts but the first shift of the morning feels like the last.
I'm really glad I didn't go with the D6 because I believe that the D6 is thinner and is mainly for fuel economy.

well its not really a 1:1 comparison since you have new fluid in there. Could you not have got the same "feeling" from fresh RP fluid? Any other data that can back your statements about Redline being better than RP? Genuinely interested in this.....

[Mr. 5]

Originally Posted by turkish335

well its not really a 1:1 comparison since you have new fluid in there. Could you not have got the same "feeling" from fresh RP fluid? Any other data that can back your statements about Redline being better than RP? Genuinely interested in this.....

You're right. It could be that it's just new fluid, but I'm happy that I made the change regardless.

[bulldog_yyc]

Originally Posted by Mr. 5

You're right. It could be that it's just new fluid, but I'm happy that I made the change regardless.

after all the track runs and beating on the car, new juice is always good

[SE3P_to_E90]

Mr. 5, your daughter in that 6er kid car is adorable. I like her car better than yours

[AlanAZ]

Could you not have got the same "feeling" from fresh RP fluid?

When I took out my factory fluid at 60K miles, it was basically done, shifts into 2nd were difficult, fluid was dark and had sediment (no track time.) I don't consider the RP I put in to be a long life oil, and will change it at 30-40K miles, and I'm very satisfied with it's performance. I put RL into the diff, that I'll keep in longer, probably 60K (if I still have this car.)

UPDATE: I changed out the RP Sychromax with less than 1 yr and 10,000 miles. Was brilliant for a just a few months and thousands of miles, then became worse than my old factory fluid over several months.

I went with RedLine ATF, as I had it in my E46 and it's improvements over the factory oil lasted. When I spoke with RL tech support about which RL to use, he said the viscosity of Synchromax is heavier than the RLs or factory. I know that color doesn't mean a lot, but bear in mind that it was a light purple color going in, and less than 10,000 mls.

UPDATE 2: I saw later on RPs website that Synchromax is compatible with MTF-LT-1, but not MTF-LT-2 & 3, which is what E90 transmissions use -- it's too viscous. I should have checked that before using it, my bad.

I like the way the Redline shifts, warms up quickly in the middle of winter, shifts are effortless, but direct, and quick. Their tech support was very knowledgeable, helped ID a clutch problem I was having:

http://www.e90post.com/forums/showth...=clutch&page=2

[tomtom]

any updates on how this fluid is holding up?

[T7R_Sky]

+1 to updates. I just passed 50k and wanted to put new fluids

[Tegs4tugs]

just passed 50k and thinking if I should go redline D4 or D6 its my weekend car but I live in NY so its cold half the time.

[AlanAZ]

just passed 50k and thinking if I should go redline D4 or D6 its my weekend car but I live in NY so its cold half the time.

I spoke with RedLine tech support about whether to go with D4 or D6, as I live in Phoenix and have to cope with the extreme heat (I went to D4 for better summer protection.) The difference in viscosity between the two is 10%, I probably wouldn't even notice a difference when it's cold. The D6 is a better viscosity match to the factory fluid, and in the colder states in winter, that 10% will make more of a difference. You might want to go with the D6.