[Chihuahua]

Originally Posted by Frejord

Hi there!

I'm planning to replace the transmission oil of my BMW 730d E65.

Here is the pic:

Attachment 1202637


I've searched this code on eBay and I found different prices:
From 4$/Liter to 30$/Liter. What's the difference between these oils?
Here is the products:
http://www.ebay.com/itm/20-Liter-ATF...item3a8b44e79a

http://www.ebay.com/itm/BMW-ATF-PLUS...item27ee439423

It is worth to buy the cheapest or not?

The transmission in your car I believe is GA6HP26Z, manufactured by ZF. If that's the case, then I'd just use ZF Lifeguard6. It's not the cheapest, but the last thing I'd ever recommend doing is putting the cheapest fluid into a transmission. I spend a little bit more for Lifeguard6 for my E60, but to me it's well worth the peace of mind it gives me.

BTW, anyone, including the dealer, that tells you to never change your transmission fluid is delusional. ZFs own literature recommends regular transmission services roughly every 50000 miles, or less if you use your BMW to tow anything.

Good luck, and don't forget to follow proper fill procedures per ZF guidelines, there is more to it than just draining old fluid out and putting new fluid in. If you don't do it correctly, you'll underfill the gearbox.