My 1992 R100GS has been running on Castrol 4T 20W-50. I do not see any reason to change this.
Opinions please!
Oil
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Major Softie
- Posts: 8900
- Joined: Tue Aug 03, 2010 1:46 pm
Re: Oil
In my opinion, MCboston is trying to start an oil-threadMCboston wrote:My 1992 R100GS has been running on Castrol 4T 20W-50. I do not see any reason to change this.
Opinions please!
MS - out
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Kurt in S.A.
- Posts: 1712
- Joined: Tue Aug 03, 2010 12:08 pm
Re: Oil
Do what your owner's manual says for circa 1992 bikes.
Kurt in S.A.
Kurt in S.A.
- Airbear
- Posts: 2890
- Joined: Tue Aug 03, 2010 10:02 am
- Location: Oz, lower right hand side, in a bit, just over the lumpy part.
Re: Oil
Welcome aboard MCboston. I'm glad to see that you are using oil.
Keep up the good work.
Keep up the good work.
Charlie
and Brunhilde - 1974 R90/6

Graduate, Wallace and Gromit School of Engineering and Design (Pending)
and Brunhilde - 1974 R90/6
Graduate, Wallace and Gromit School of Engineering and Design (Pending)
Re: Oil
I will be one to recommend changing your oil -MCboston wrote:My 1992 R100GS has been running on Castrol 4T 20W-50. I do not see any reason to change this.
Opinions please!
at regular intervals as prescribed by the factory manual.
Filter, too !

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Kurt in S.A.
- Posts: 1712
- Joined: Tue Aug 03, 2010 12:08 pm
Re: Oil
There's always the oldie but goodie - clean oil is better than dirty oil and dirty oil is better than no oil!
Kurt in S.A.
Kurt in S.A.
Re: Oil
Absolutely nothing wrong with Castrol 20/50, my '87 ran on it for 90,000km.
Then it blew up.
Then I changed to Belray semi-synthetic 20/50.
Then I changed to Belray semi-synthetic 20/50.
I've spent most of my money on women, motorcycles, and beer.
The rest of it I just wasted.
The rest of it I just wasted.

