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Dec 16th, 2011, 12:26 pm
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#1 (permalink)
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Senior Member
Join Date: Aug 2008
Location: London, , England
Posts: 960
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S/M Oil Causing Engine Wear
Has anyone got any thoughts on synthetic oil which is rated at SAE SL/SM not providing adequate lubrication? Modern synths such as Shell Advance Ultra have greatly reduced levels of ZDDP (basically an additive containing zinc and phosphate) which has resulted in heavy wear of cams and rockers in classic engines. Now I know that our Ducatis are not classics (yet) but the cams and rockers are basically the same as Ducatis of old. The level of ZDDP was reduced in these oils to stop them contaminating the catalytic converter, so would we be better off using an oil with higher levels of ZDDP rated at SG or SJ?
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Dec 16th, 2011, 1:00 pm
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#2 (permalink)
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Senior Member
Join Date: Dec 2008
Location: Munich, Bavaria, Germany
Posts: 1,981
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I would say that modern oils are perfectly suited for our bikes…
As long as they have the correct specification…
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Dec 16th, 2011, 2:01 pm
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#3 (permalink)
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Senior Member
Join Date: Mar 2006
Location: Phoenix, AZ, USA
Posts: 2,438
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Well, I've used just about every oil under the sun in the last 60,000 miles including semi-synthetic and blends of multiple brands, with no noticeable wear so my suggestion would be to not worry too much about it. Use Moto specific oil, change it every several thousand miles, and ride and ride...
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Dec 16th, 2011, 2:27 pm
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#4 (permalink)
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Member
Join Date: Aug 2007
Posts: 71
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I suggest that you use a motorcycle specific oil in air-cooled, wet-clutch engines. However, some folks run automotive oils and report good results. I tend to err on the side of caution and only run a full synthetic (group IV) oil with a rating of API SG, SH/CF, JASO MA.
__________________
Ken
'07 GT 1000 (Gray)
'74 750 GT
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Dec 16th, 2011, 7:03 pm
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#5 (permalink)
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Senior Member
Join Date: Apr 2007
Location: Portland, Oregon, USA
Posts: 878
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OIL THREAD! YEA!! 
Red Line full synthetic motorcycle oil 10-40. Period.
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Dec 16th, 2011, 7:59 pm
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#6 (permalink)
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Senior Member
Join Date: Sep 2006
Location: Fairfax, California, USA
Posts: 1,313
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Shell Rotella-T full synthetic, around $16-$17 a gallon at Wally World. 
__________________
When I was fast,
motorcycles were slow.
Now motorcycles are fast,
and I'm slow.
"Black is the only color for a motorcycle.
Unless you want to sell it, then paint it red."
- Melvin "Swede" Dunlap, 1966
Cafe racers are built,
not bought.
The older I get,
the faster I was.
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Dec 17th, 2011, 1:22 am
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#7 (permalink)
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Senior Member
Join Date: Aug 2008
Location: London, , England
Posts: 960
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$16-$17 a gallon!! you guys don't know how lucky you are! The cheapest synthetic over here is $60 a gallon and the dearest is around $150.
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Dec 17th, 2011, 6:06 am
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#8 (permalink)
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Senior Member
Join Date: Jun 2009
Location: brooklyn, N.Y., USA
Posts: 663
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Quote:
Originally Posted by Duccout
$16-$17 a gallon!! you guys don't know how lucky you are! The cheapest synthetic over here is $60 a gallon and the dearest is around $150.
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$150 a gallon?? Want to by some oil? No really, would it work to buy the oil here and ship it across the pond?
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Dec 17th, 2011, 8:06 am
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#9 (permalink)
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Senior Member
Join Date: Dec 2008
Location: Munich, Bavaria, Germany
Posts: 1,981
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UK oil source
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Dec 17th, 2011, 12:39 pm
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#10 (permalink)
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Senior Member
Join Date: Feb 2007
Location: Nottingham, Nottinghamshire, United Kingdom
Posts: 744
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