About this item.....
Straight non-detergent engine oil for vintage motorcycle engines.
Part of the Fuchs-Silkolene Classics range.
Silkolene Classic oils are blended using modern base stocks and additives to suit the the requirements of older motorcycles, cars and other vintage engines.
Classic Donnington 40 straight oil is a non-detergent oil that is ideal for very old engines with total loss lubrication systems where engine speeds are low and operating temperatures are moderate.
Donnington40 can also be used in engines with re-circulation systems (as long as the sump or oil tank is drained every 1000 miles).
Silkolene Donnington 40 is a precisely and carefully controlled and blended product that is manufactured to internationally recognised specifications and is designed to match the viscosity grades and specifications recommended by the engine manufacturers in the early part of the 20th century.Viscosity:
Monograde non detergent (SAE 40)
Suitable for use in classic motorcycle and cars engines requiring an SAE40 oil with no detergents.
Available in 5 litre drums only. Not sure which oil you need for your bike? Ask Us!
Postage price for this item:
from £5.95 (per order not per item)
Free delivery on orders over £70 (excluding post)
We can also deliver parts to Europe and some other countries Ask Us Here!
This item weighs 5.000 kg
Delivery restrictions for items over 1kg may apply to some UK outer areas (Northern Ireland, Scottish outer areas, Isles of Wight, Man etc). More info...
Questions and answers about this item....
You can ask a question about this item Here
Which oil should I use in a 1971 classic Triumph Bonneville 650. I have been using a straight 50 monograde oil? Answer:
You would need a straight 40, non detergent oil like Rock Oil Classic 40 for a 650 Bonneville as they have a sludge trap (not a proper oil filter).
Also, a straight 40 (SAE 40) is generally better for use in the UK as its slightly thinner then an SAE 50 oil and will circulate round the engine easier (although due to the way the Bonnie oil tank and pump work you will still need to thoroughly need to warm the engine before riding). Straight 50 oils are more suited to Bonnevilles that are used for racing and use in warmer climates.
Hi, which oil would you recommend for an old rotavator without oil filter. I want SAE 40 viscosity. I understand that modern oils are designed to carry debris to the filter, but I want it to leave debris in the sump? Answer:
If you havent got a proper, paper filter in the rotavator, you will need a Classic (straight) oil like Silkolene Donnington 40 as they normally dont contain detergents (the detergents in oils are what washes the dirt and debris into the oil filter).
Whats the best oil I can use in a 1968 BSA 500 Royal Star? Answer:
For a 1968 BSA Royal Star engine we would recommend a straight 40 classic oil like Silkolene Donnington 40.
There is no real best oil for most of the old clunky bikes as there from a time when there was only 1 oil spec and lack of proper paper oil filter means the engine would not be able to cope with the detergents in modern (multigrade) oils.
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Buying and return info...
Can you return this item for an exchange or refund?
Yes, you can return this item up to 30 days after it has been delivered for a refund or exchange. More info...How can you pay for this item?
You can pay by credit/debit card, Paypal or postal order.
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Who are Whitedogbikes?
White Dog Motorcycle Accessories are a small mail order motorcycle parts business based in Halesworth, Suffolk (on the east coast of the UK).
We have been selling motorbike and scooter parts and accessories since 2003. More info...
Do we have a shop you can visit?
Yes, our address is:
You can also find our address and a map on our Location Page
How can you contact us if you have a question?
You can contact us using the details below (please note, if you are asking technical, measurement or fitment type questions please email as it gives us a chance to research our answer so we can give you the correct info):
You can also email us on our contact us page
How much is postage on this item?
Postage for this item is: from £5.95 (per order not per item)
Free delivery on orders over £70 (excluding post)
Do you have this item in stock?
We do keep this item in stock but in very low quantities (1 or 2).
You can order more but please expect a delay of a week or so for delivery of larger quantities.