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Oil and Filter [message #302079] Mon, 06 April 2020 21:11 Go to next message
slaz is currently offline  slaz   United Kingdom
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(21) Valentino Rossi
So now the sprockets done,what oil would you suggest for a

BMW F650GS 2001 think

Stay Safe Baza Thumbs Up
Re: Oil and Filter [message #302080 is a reply to message #302079] Mon, 06 April 2020 21:33 Go to previous messageGo to next message
Kermit is currently offline  Kermit   United Kingdom
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(22) Giacomo Agostini
No idea with BMW's as aren't they a bit odd with their recommended oils although I suspect someone else will be along soon who'll know verbatim what the best oil is Wink

For me, I always tend to opt for a big brand (Shell, Castrol, Motul), 10-40W and if I'm feeling flush, the fully synth although have been known to go for semi

Right now my 929 has Shell Advanced Ultra 10-40W in it but you've reminded me I should change it as although it likely done less than 1500 miles in 2 years, it is 2 year old oil now Sad
Re: Oil and Filter [message #302081 is a reply to message #302080] Mon, 06 April 2020 22:03 Go to previous messageGo to next message
slaz is currently offline  slaz   United Kingdom
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(21) Valentino Rossi
I use Castrol 10w 40 4T last time,seems to do the job,i was just curious really ;-)
As you can tell,i'm on a roll ;-)
Stay Safe Baza
Re: Oil and Filter [message #302082 is a reply to message #302081] Tue, 07 April 2020 09:38 Go to previous messageGo to next message
Tomthumb is currently offline  Tomthumb   United Kingdom
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(6) Moto1 GP Racer
Tyres next matey Grin Thumbs Up
Re: Oil and Filter [message #302083 is a reply to message #302082] Tue, 07 April 2020 11:28 Go to previous messageGo to next message
Yorkie is currently offline  Yorkie   United Kingdom
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(8) Moto2 GP Racer
Semi-synthetic or fully-synthetic ???

I'm glad someone has asked that question because I never know which I should be using. I always imagine that full will be better, but I have heard that until the engine has done around 6-8k you should stick with semi. Is that correct?, and if so why?

And what is "ester" synthetic??

It's a real minefield RollEyes
Re: Oil and Filter [message #302084 is a reply to message #302079] Tue, 07 April 2020 14:16 Go to previous messageGo to next message
Kakugo is currently offline  Kakugo   Italy
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(19) John Surtees
Run of the mill 10W-40 or 15W-50, those old engines aren't really designed for recent light oil like 5W-40 or similar. Not that they'll break down but you may seem some oil consumption even in a healthy engine. And nobody wants to read a "My engine has started using oil!" post. Wink

As a chemist I am saying this: the whole "synthetic" and "mineral" thing is ancient history. In fact I don't even know if traditional mineral or synthetic oil are even available anymore in Europe outside of special orders with Castrol and Motul. think
Watercooled BMW boxers run on synthetic oil from the factory, and I think most Ducati's and Yamaha's do as well. This stuff is mind-boggingly stable.

The only exceptions are ester-based oils, like the Motul 300V: esters break down under high temperatures and pressures far faster than PAO (Poly Alpha Olephines, the basic components of synthetic lubes) so the oil needs to be replaced at shorter intervals. But given the advantages ester-based oils give on very high power engines it's a worthwhile trade. Thumbs Up

As per brands I like Repsol, Motul and Mobil. Castrol and Shell are great but are getting hard to find here.
Re: Oil and Filter [message #302087 is a reply to message #302084] Tue, 07 April 2020 15:20 Go to previous message
slaz is currently offline  slaz   United Kingdom
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(21) Valentino Rossi
Thanks Kak,top advice as usual Thumbs Up
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