Gearbox Oil Twincam RT

[David.]

Will you be using what's left in the bottle in the final drive? Be a shame to see it sat on the shelf for the next 12 months.

Recently purchased some Comma EP80W-90 GL-4 for the XJ650 FD unit, it has a shelf life of 5 years from date of manufacture.

[David.]

I use the Castrol Syntrax Longlife 75w-90 (Formerly SAF-XO 75w-90) in the gearbox & final drive.

I see just to confuse matters, Castrol have changed the name and packaging again, Castrol Transmax Axle Long Life 75W-90 (Formerly SAF-XO 75W-90 and Syntrax Longlife 75W-90).

As confirmed by Motorworks, Motorworks BMW Motorcycle Specialists - Shop - Spares and Accessories

[David.]

Have recently been looking for some Castrol Transmax Axle Long Life 75W-90, it's currently out of stock at OPIE Oils, Motorworks and Nippy Normans.

Please can anyone recommend a UK supplier or suggest a suitable alternative, thank you.

Liqui Moly looks like a good alternative, https://www.infinitymotorcycles.com/pro ... atch%20All

[Stu]

Have recently been looking for some Castrol Transmax Axle Long Life 75W-90, it's currently out of stock at OPIE Oils, Motorworks and Nippy Normans.

Please can anyone recommend a UK supplier or suggest a suitable alternative, thank you.

Liqui Moly looks like a good alternative, https://www.infinitymotorcycles.com/pro ... atch%20All

Amazon?

Is this the same

https://www.amazon.co.uk/Castrol-Syntra ... =8-1-fkmr0

[David.]

Is this the same.

https://www.amazon.co.uk/Castrol-Syntra ... =8-1-fkmr0

No, I don't think so, Castrol do three variants of Transmax, ATF, Manual & Axle, https://www.castrol.com/en_gb/united-ki ... nsmax.html

Axle Long Life is the spec. required, https://msdspds.castrol.com/bpglis/Fusi ... az3hzs.pdf

[Stu]

I'm not at home at the minute but what's the actual spec that the service manual asks for?

Transmax universal says its for transmissions final drives and differentials and I'm pretty sure that meets the spec so maybe check that one out

[David.]

The BMW service parts list asks for BMW Synthetic OSP which is equivalent to SAF-XO as per the Haynes Manual.



https://www.deutsche-parts.co.uk/331176 ... -part.html

This is the SAF-XO data sheet, https://www.ge39.com/files/SAF_XO_SAF_XJ_B1174_96.pdf

Over the years, Castrol have re-branded SAF-XO > Syntrax > Transmax Axle.

This is the Transmax Axle data sheet, https://msdspds.castrol.com/bpglis/Fusi ... az3hzs.pdf

Both the SAF-XO and Transmax Axle specs. look the same.

[Stu]

apparently this is the replacement for Castrol 75W-90 C-SAF-XO if it helps at all

https://classicoilsshop.co.uk/castrol-syntrax-75w90

[David.]

I would agree that Syntrax replaced SAF-XO but Castrol seem to have now changed Syntrax to Transmax Axle.

https://www.motorworks.co.uk/gear-oil-oia11056-1.html

Just spotted that Motorworks do list some alternatives.

[Stu]

I have dropped Castrol an email to see what they say

I suspect whatever you use as long as it meets the spec it will be more than good enough

[David.]

I have dropped Castrol an email to see what they say.

It would be interesting to know why Transmax Axle is currently out of stock.

[Stu]

Maybe there is another replacement we don't know about yet

[David.]

I suspect whatever you use as long as it meets the spec. it will be more than good enough.

I'm sure you a right but if available, would rather use the BMW recommended Castrol stuff.

[David.]

Maybe there is another replacement we don't know about yet.

This is the current Castrol recommendation, https://www.castrol.com/en_gb/united-ki ... haft-drive select "Shaft Drive".

[David.]

This would seem to confirm that Red Line 75W90 meets the BMW SAF-XO spec. too, although more expensive from the USA.