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When they changed the recommended viscosity for the final drive did they also change the recommended viscosity of the transmission to 75W90 from 75W140?
The reason I was asking about 75W140 is because that is what Irv Seaver, the BMW dealer in Orange County sold me for the final drive and transmission a few months ago. So now I am wondering whether I should use it for the transmission, the FD or both or neither.
...I asked my BMW parts guy what they use in their service department for final drive oil in a R1200RT, and he answered, "Regular gear oil -- something in a 55-gallon drum".
... The back-label of "Synthetic BMW Gear Oil SAE 75W140 Super Synthetic" reads exactly as follows:
Super Synthetic Engine Oil / SAE 75W140
ÔÇó Recommended for all BMW motorcycles after 1970
ÔÇó Field Tested by BMW NA.
ÔÇó High-performance synthetic provides high load-carrying characteristics, minimum foaming, and exceptional resistance to thermal degradation and oil consumption.
ÔÇó Exclusive chemistry reduces internal friction and enhances power output under extreme conditions
BMW SAE 75W140
Synthetic Gear Oil
... Is BMW Gear Oil SAE 75W140 Super Synthetic an acceptable alternative gear oil to BMW Gear Oil SAE 75W90 Super Synthetic in certain applications?
I am totally confused!!! HELP!!!
Oddly, my BMW dealer doesn't stock BMW 75W90 gear oil or Castrol SAF-XO. They do stock BMW 75W140 synthetic gear oil.
I asked my BMW parts guy what they use in their service department for final drive oil in a R1200RT, and he answered, "Regular gear oil -- something in a 55-gallon drum".
If the BMW REP-ROM specifies Castrol SAF-XO, yet BMW NA markets both BMW 75W90 Super Synthetic gear oil and BMW 75W140 Super Synthetic gear oil -- what are we supposed to use?
And, what is so wrong with using BMW 75W140 super synthetic gear oil in the final drive -- why does it even exist?
If BMW 75W140 synthetic gear oil should NOT be used in the final drive, where should it be used? Apparently not the gear box, as the BMW REP-ROM indicates, Brand name hypoid-gear lubricant SAE 90 API GL 5.
What the heck is BMW 75W140 synthetic gear oil for, if not the final drive?
The back-label of "Synthetic BMW Gear Oil SAE 75W140 Super Synthetic" reads exactly as follows:
Super Synthetic Engine Oil / SAE 75W140
ÔÇó Recommended for all BMW motorcycles after 1970
ÔÇó Field Tested by BMW NA.
ÔÇó High-performance synthetic provides high load-carrying characteristics, minimum foaming, and exceptional resistance to thermal degradation and oil consumption.
ÔÇó Exclusive chemistry reduces internal friction and enhances power output under extreme conditions
BMW SAE 75W140
Synthetic Gear Oil
Sold by BMW of North America, LLC, Woodriff Lake, NJ 07675. Formulated, Blended and packaged exclusively for BMW of North America by Spectro Oils of America.
Is BMW Gear Oil SAE 75W140 Super Synthetic an acceptable alternative gear oil to BMW Gear Oil SAE 75W90 Super Synthetic in certain applications?
I would use the 75W90 synth that the BMW bulletin says to use in the new final drives...the K2x and K4x bikes. As far as the trans goes and the fd in the older bikes, AND maybe even the new fd in those new bikes, I guess you could use the 140, but it is probably not necessary.
Does it REALLY say "engine" ???
What part of "recommended for all BMW motorcycles after 1970" isn't clear enough?
As I commented in an earlier post, I have BMW 75W140 in my FD right now. It was put there by Max BMW, a very reputable dealer, about a month ago.
The recommended for BMW motorcycles language on the 75w140 bottle applies to transmissions. It even says so in the repair manuals.
But the repair manuals do not say so for final drives.
It's your bike - use what you wish. I prefer to use the grade and viscosity specified by BMW as stated in the repair manuals and owner's manuals.
So: if you have a little book (Owner's or Rider's Manual) or a Repair Manual published by BMW for a post 1970 BMW motorcycle that specifies a FINAL DRIVE GEAR OIL THICKER THAN 90 WT please post that information here.
Please be specific - model, year, which manual, date of manual, etc.
One more thought on the topic.
So: if you have a little book (Owner's or Rider's Manual) or a Repair Manual published by BMW for a post 1970 BMW motorcycle that specifies a FINAL DRIVE GEAR OIL THICKER THAN 90 WT please post that information here.
Please be specific - model, year, which manual, date of manual, etc.
Thanks
R1200ST, 2007, purchased 7/07, owners manual, 3rd edition 6/2006.
This little book says absolutely nothing about lubricant specs for either the FD or the tranny, it only mentions engine oil. I was surprised at the omission and double checked, nothing.
Following the most recent BMW bulletin makes as much sense to me as anything else here.