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Performance Engine Oils
Millers Oils CFS 5w-40 Fully Synthetic Engine Oil

Millers Oils CFS 5w-40 Fully Synthetic Engine Oil


Millers Oils CFS 5w-40 - 1 Litre

1 Litre


Millers Oils CFS 5w-40 - 5 Litres

5 Litres


Millers Oils CFS 5w-40 - 20 Litre Drum

20 Litre Drum


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  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Millers Oils CFS 5w-40 Fully Synthetic Engine Oil

This is a fully synthetic engine oil composed of 100% synthetic base fluids. Featured in this engine oil is a synergistic blend of three esters, alongside high-quality additive technology to maximise performance.

It’s suitable for race, fast road, rally, sprints, and hill climbs, and has been proven in race motorcycles with wet clutches. Incorporating Millers Oils original NanoDrive low friction technology, this oil increases power and torque, making it ideal for non-professional racing.

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Users can expect a reduction in friction of up to 26%, as well as reduced wear compared to a standard engine oil. It also contains a high film strength to provide ultimate protection, while its load carrying capacity is many times that of mineral oil.

In terms of heat, the CFS 5w40 has excellent thermal stability and oxidation resistance, but also possesses incredible cold flow properties for reduced wear at start up. This engine oil strikes the optimum balance between boundary and hydrodynamic lubrication and the power absorbed through pumping losses, so the engine ensures maximum power release.

Three esters are used in combination to improve lubricity, reduce friction, and enhance the oil’s overall performance. By using both polyalphaolefins (PAO) and ester synthetics that have been specially selected to minimise the quantity of polymer used, the lubricant film provided is more resistant to ‘shear’ and viscosity loss, even in highly stressed areas.

Millers Oils
Established in 1887, Millers Oils are a leading independent blender of oil and fuel additives. They have a wide range of different transmission and engine oils, as well as fuel treatments. Each is formulated to deliver outstanding performance and increased engine longevity.


  • Specifically designed to far exceed the requirements of API SL/CF, and ACEA A3/B4
  • Ideal for fast road or track day use, particularly in engines where a 5w30 is specified
  • Can operate at 125°C, reaching peak temperatures of up to 150°C


SHIPPING IS FREE* for orders of £75 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £5.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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Brand: Millers Oils
Oil Type: Race / Competition Synthetic