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From 1st July 2021 Rally Design will not be able to process orders to retail EU customers with a product value less than £135.00 (€150.00). Above €150.00 local customs may charge VAT, import duty and handling charge. Additionally postal operators and couriers may charge a fee to collect these charges. Please note, this does not apply to UK consumers or EU B2B customers. David Elderfield, Managing Director. Last Updated 01/07/2021.
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CSS 10w40 High performance road race car & bike engines


High performance competition semi-synthetic engine oil. Combination of the highest quality and latest performance additives in synthetic and mineral base stocks.


for engine lubrication of high performance car or motorcycle engines. Suitable for modern high performance engines with or without turbo chargers

User Benefits

  • The latest lubricant technology has been utilised to provide a catalytic converter compatible oil, engineered to meet the demands of today's competition engines and conditions.
  • Sophisticated performance additive package combined with semi-synthetic base fluid provides maximum engine protection and minimum power loss.

Millers Oils Part Number was previously: 5221GF


Your IP Address indicates that you are in the United States or Canada and we are currently unable to sell into those countries. If you do not reside in the United States or Canada then please e-mail your request directly to sales@rallydesign.co.uk quoting Ref: CATINFO/SG2/

PLEASE NOTE: All prices exclude VAT at 20%.
Where applicable, this is calculated and added during the checkout procedure.
This product was added to our catalogue on Saturday 08 November, 2014.
SAE Viscosity:  10w40
Specific Gravity (at 15C):  0.88
Kinematic Viscosity (at 100C, cSt):  14
Kinematic Viscosity (at 40C, cSt):  96
Viscosity Index:  150
Pour Point (C):  <-25
Flash Point (C):  >200
Cold Crank Viscosity (cP):  7,000
Current Reviews:

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Rally Design Limited • Unit 4 St. Augustine's Business Park, Estuary Way, Swalecliffe, Kent, CT5 2QJ
Vehicle Identification: References to vehicle marques such as Ford, Vauxhall, Westfield, Caterham etc. are for vehicle fitment identification purposes only.
These references must not be used to imply the vehicle manufacturers have been involved in the design of these products nor endorsement of same.
Product Images: The images shown on this website are for illustration purposes only and may not be that of the actual product. If you are unsure please ask.