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Which Oil do You use in your Vincent?

Shadowman

Well Known and Active Forum User
VOC Member
#1
I have used Duckhams 20/50 for years without a problem. Now I hear it is being discontinued.
What do you all recommend?
Regards to all.
Peter Sprot.
 

Comet Rider

Well Known and Active Forum User
VOC Member
#2
Personal Preference

:)
Hi Peter,

As much as anything it's down to personal preference. In both mine and dad's Comets we run semi synthetic 15-50 wt oil. I buy it in bulk from my local central heating oil supplier. It's made bny Q8, and retails for arround £40 for 25 litres.

We used to run Morris straight 40, but I found that I was getting excessive cam and follower wear, which was eventually traced to poor drillings in the rocker retaining bolts...

Neil
 

Tom Gaynor

Well Known and Active Forum User
VOC Member
#3
Oil in Vincents

I have just bought Shell Rimula 40X, apparently the successor to Rotella which I had previously used for no better reason than inheriting a 40 litre drum of it. What I believe is that with a very low flow (5 cc per stroke) a Vincent needs traditional oils, rich in carcinogenic and environmentally unfriendy additives, and oils designed for diesel engines meet the bill. They are inexpensive (Rimula is £27.40 + VAT for 20 litres) - and if push comes to shove can be bought in motorway filling stations. Try buying Castrol R in Shetland......
 

John Cone

Well Known and Active Forum User
VOC Member
#4
Tom, I have been using Shell Rimula in our trucks for over 20 yrs, when you read about the service intervals on modern diesel engines I wonder who is ripping who off. Shell garantee Rimula for 100.000 miles, so it's plenty good enough for my Prince.
John
 

Tom Gaynor

Well Known and Active Forum User
VOC Member
#5
Tom, I have been using Shell Rimula in our trucks for over 20 yrs, when you read about the service intervals on modern diesel engines I wonder who is ripping who off. Shell garantee Rimula for 100.000 miles, so it's plenty good enough for my Prince.
John/ thanks. Always nice to have a decision confirmed!
 

Tnecniv Edipar

Well Known and Active Forum User
Non-VOC Member
#6
Theoretically , a multi grade with a wide viscosity rating should be avoided in engines with roller bearing bottom ends. The reason being that it is generally viscosity improvers that are used in such oils to achieve their viscosity spread , but these are sheared down more quickly in roller bearing type motors so the oil reverts to it's base lower viscosity , so in the case of say a 15w50 , it would become a 15 grade oil !! Not good !! Thats why mono grades are advisable. Things are not quite that simple though , if the oil is changed quite frequently by modern standards , ie 1000 - 2000 miles , a high quality wide viscosity range oil will probably not shear down by any significant amount , and , they are preferable in the respect of better cold start protection due to their lower cold temp viscosity. One way to determine if a chosen lubricant is performing ok is to have an oil analysis performed on a small sample. The resulting report will indicate any problem issues , such as larger than acceptable metal deposits which can indicate bearing problems for example , fuel dilution , etc etc . This is a normal routine for commercials and plant engines where engines are very expensive to maintain and overhaul , so there are a number of labs providing this service at reasonable cost.
 

john998

Well Known and Active Forum User
VOC Member
#7
Oil

The Rapide has had Chatworth stright 40, since the last engine rebuild.
As the engine now has 50K under it's belt, I decided that a look under the timing cover would be a good idea. The cams, cam followers, and spindles look as good as ever.
The idear of saving money on oil and using multigrade has therfore been abandoned.
Perhaps the secret is to allow the motor to warm up at no more than 60'ish
for the first 10 miles.
John Stainton.
 

Tnecniv Edipar

Well Known and Active Forum User
Non-VOC Member
#8
For sure always good practice , especially as Vincents have such slow oil circulation and are consequently so slow to heat the oil to operating temp. I recall seeing a tech article that found if the space between the inner sides of the fuel tank and the UFM were blocked to prevent airflow that oil temp went up from 60 or 70 deg c , which is really too low for the oil to work properly , to 80 - 90 deg c which is much better.
 

harry

Forum User
Non-VOC Member
#9
Like John Stainton i too use Chatsworth 40. I run the first 30-40 miles about 50-60. The engine feels really ready to go. I rebuilt my engine about 10 years back having covered 500,000 Miles. Iused Duckhams for most of that, as i did with all my past bikes. Rotella was another oil, used also on compressors, i used this on my A10 BSA. again without any problems. Harry McMaster.
 

john998

Well Known and Active Forum User
VOC Member
#11
Oil change.

I change the oil at the recommended 2000 miles, the oil filter at 4000 miles.
In the early day of ownership the filter was removed at each change and cleaned, on reflection this was not a good idea as it is impossible to get it clean.
I do wonder if with the improvement of modern oils the time between changes could be stretched.
John.
 

Tnecniv Edipar

Well Known and Active Forum User
Non-VOC Member
#12
Vincent recommended 2000 miles change intervals for the engine oil & filter cleaning after no more than 10,000 miles with a new one after no more than 20,000 miles !!! Personally I would change oil at 1500 miles & filters every other oil change. Modern oils will go much longer than 2000 miles but its the standard of filtration which limits the interval.
 

BlackLightning998

Well Known and Active Forum User
VOC Member
#14
Just another thought , if airfilters are used I reckon the change interval could be pushed to 4000 miles.
Hi,

My Rapide engine was re-built by Terry Prince before I bought it - so I've bought a stock of his full-flow oil filters - they look a very good piece of work and reasonably priced too. He recommends fully synthetic oil once run in for one of his engines so long as you use the filter.

I guess changing the oil and filter too often only brings added cost with it - leaving it go too long may cause mechanical problems with disasterous consequences - ouch!

I intend to err on the side of changing too early rather than too late.

Particularly with machines that don't get regular and constant use there is the risk of the oil degrading as much as suffering normal wear in use.

Stuart
 

nkt267

Well Known and Active Forum User
VOC Member
#15
Hi lads.I dont have a problem with oil changes on my Comet as it is half a Torry Canyon.John
 

glen

Forum User
VOC Member
#16
Thanks for the reply,s
so what synthetic oil is best to use, and i
recomment changing the oil filter every time the oil is replaced,
Has the oil filter is full of contaminated oil which is getting the new oil dirty
has soon has you start your bike?
 
R

Rap998

Guest
#17
I use Roc Oil TRM Semi-synthetic. Change once a year after 1000-1200 miles.
About £30 for 4l.
Change filter everytime.
 

Tnecniv Edipar

Well Known and Active Forum User
Non-VOC Member
#19
Thanks for the reply,s
so what synthetic oil is best to use, and i
recomment changing the oil filter every time the oil is replaced,
Has the oil filter is full of contaminated oil which is getting the new oil dirty
has soon has you start your bike?
IMHO , the best synthetic oils available are Redline , Motul & Amsoil.

Motul would be a good choice from a practical point of view as its very popular with motorcyclists and consequently available from many bike shops.
 

glen

Forum User
VOC Member
#20
thank for the reply Tnecniv Edipar,
but which motul oil is the best to use?
is it 300v 4t but which viscosity?
 
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