BMW R1200RT/R1250RT Forum

David. wrote:Found this at OnBuy.com, Castrol Power 1 Engine Oil 15W-50 4T, 4L, Castrol Power 1 Engine Oil 15W-50 4T, 4L on OnBuy

Black Friday deal, now £26.21.

At £25 for 5 litres, this is a cracking price for 15W-50 Fully Synthetic from Smith and Allan, Fully Synthetic 15W-50 Motorcycle Engine Oil Ultra 4T 4-Stroke 5 Litre 5L : Amazon.co.uk: Automotive

Nothing beats Amsoil Metric MCV 10W40 for motorcycles. Google the tests. My 2021 R1250RT has been running on it since new (starting at 20 miles). For the final drive, Amsoil Severe Gear 75W110 and I change it every time I do an engine oil change.

Decided to get some more oil from OnBuy.com at £32.95, https://www.onbuy.com/gb/castrol-power- ... earch_2000

Yes, you can get it cheaper but as I supply it to BMW for my service, I'd rather have Castrol as recommended by BMW.

Any of this any good for the water cooled R’s?

https://www.onbuy.com/gb/car-engine-oils~c10488/

Steve398 wrote: ↑Fri Oct 21, 2022 8:48 pm Any of this any good for the water-cooled R’s?

Those OnBuy oils are car oils, not suitable for a wet clutch.

You need 5W-40, JASO MA2, https://www.smithandallan.com/product/s ... e-oil-4120

or

Halfords, https://www.halfords.com/motoring/motor ... 63070.html

Just learned that there was a clearance sale at the local supermarket and Motul 7100 10W40 was 25,- euros per jug. Normal price is typically between 60...70,- e.

Now I have Motul for several years.