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Members: 600 | Total Threads: 50,791 | Total Posts: 518,264 Currently Active Users: 462 (0 active members) Please welcome our newest member, carthagho |
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27-03-2019, 08:53 PM | #1 |
Registered User
Join Date: Feb 2014
Location: Powys
Bike: M900
Posts: 334
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Oil - semi or fully synthetic?
I’m sure this has been done to death - sorry - but is fully synthetic worth it for a 93 M900? It’s coming to change time and I’m not sure. The price difference isn’t the issue - a few pounds - but I’m wondering if there’s any point on a engine which I’d imagine wouldn’t have been designed with fully synthetic in mind?
While I’m pushing my luck, any favoured brands? I’m thinking 10/40 incidentally unless told otherwise. Last edited by Goofle; 27-03-2019 at 08:56 PM.. |
28-03-2019, 01:12 PM | #2 |
Registered User
Join Date: Sep 2012
Location: gloucester
Bike: M900ie
Posts: 133
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Tim Hyett recommended Castrol R 10/40 when he stripped my motor 18 months ago - not discoloured and used none since (low mileage - 12000)
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28-03-2019, 01:57 PM | #3 |
You Are What You Is
Join Date: May 2005
Location: A Foward Location
Bike: S4r
Posts: 1,948
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I would not recommend R
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28-03-2019, 02:11 PM | #4 | |
Guest
Posts: n/a
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Quote:
In many cars that have a few years production run with the same engine you will find that the later versions specify a newer oil spec. |
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28-03-2019, 05:30 PM | #5 |
Old Git
Join Date: May 2006
Location: Cricklade
Bike: Multiple Monsters
Posts: 2,816
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On all my 2 valve motors I use a good semi synthetic and on 4v motors fully synthetic as they need it for the cams and they rev higher ,,, my preferred btands are putoline for 2v and Motul for 4 v motors
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MONSTERMAN |
28-03-2019, 07:43 PM | #6 |
Registered User
Join Date: Feb 2014
Location: Powys
Bike: M900
Posts: 334
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I settled on Castrol fully synthetic - from Halfords. The Monstro will soon be back on the road again - now in Mid Wales!
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28-03-2019, 07:44 PM | #7 |
Registered User
Join Date: Feb 2014
Location: Powys
Bike: M900
Posts: 334
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Ps can a moderator move my location to Powys please?
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28-03-2019, 11:24 PM | #8 |
Too much time on my hands member
Join Date: Jun 2007
Location: Forest Of Dean
Bike: S2r
Posts: 3,189
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Since pre WW1 Castrol R (CASTROL brand name BTW is derived from CASTER and OIL) has been a mixture of synthetic oil and castor oil, the castor oil has surprisingly good boundary layer lubrication properties (pistons, cam lobes). The castor oil component has always been low, just enough to give the anti-scuff properties which means way less than 1%.
These days it's a bit niche, awesome stuff if you happen to run a methanol fueled 2 stroke. I suspect Tim said Castrol POWER1 Racing 4T 10W-40 which is a modern 10-40 synthetic oil and CASTOR only appears in the brand name!!
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"The final measure of any rider's skill is the inverse ratio of his preferred Traveling Speed to the number of bad scars on his body." Song of the sausage creature |
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