[WiL335i]

I too performed this maintenance at around 60,000 miles. I also used Mercon SP. I'm at 65,000 miles now and the car is running great. I'm able to hit that 28 mpg average at times. My mileage improved after changing the oil and filter pan.

[94boosted]

Originally Posted by 2fast4

I've been using Castrol Multi-Vehicle ATF(wallyworld) which is LT71141 compatible. (I bought them few years ago to stock it).
Now it is no longer compatible with LT71141 so don't buy it.

I changed it about 50k miles interval. With top-off at about 20k miles in between(I now know the behavior; on freeway speeds and hit the pedal, with low fluid it would be strong and shocking shift. With full level, it'd shift smoothly i.e. gradual shift). I topped it off with Carquest Peak/Carquest Multi-Vehicle ATF part# CQ470.
Old fluid came out dark red vs new fluid being translucent light red you can see thru it.

I didn't change the pan filter/sleeve this time since it only has 50k miles ago. Maybe next time(PITA job).

Also wallyworld sells Valvoline Multi-Import ATF that lists LT71141 compatible at $4.~~. I might do that. Carquest/Oreilly has Motorcraft Mercon SP for 7.~~, or Peak Multi-Vehich ATF for 6. Now I'm not certain about the Motorcraft compatibility with LT71141.

The main thing is whichever ATF you use, look for LT71141 in the label.
And change it at 40-50k miles interval with occasional checking and top it off.
There are still old ATF inside the torque-converter so you'll mix it with new.

No problems with ATF I bought from wallyworld with 55k miles.

Thanks for the response. What is the LT71141 spec you are referring to? Is that a BMW spec or a ZF spec?

Why are you saying the pan/filter and sleeve is a PITA. Once you've got the fluid drained out shouldn't changing the pan be pretty straightforward?

I take it you just used this DIY (http://www.e90post.com/forums/showth...mission&page=3)?