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Performance Engine Oils
Millers Oils Classic Preservation Oil 20W-50 Mineral Oil

Millers Oils Classic Preservation Oil 20W-50 Mineral Oil


Millers Oils Preservation oil - 5 Litres

5 Litres


Millers Oils Preservation oil - 20 Litres

20 Litres


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  • Description
  • Benefits
  • Specifications
  • Shipping Explained

Millers Oils Classic Preservation Oil 20W-50 Mineral Oil

A dual purpose SAE 20w50 mineral preservation oil for storage and limited running of engines. It is specifically engineered to provide both rust and corrosion protection for petrol and diesel engines.

Use as received to provide storage protection of mechanical parts. Primarily for engines, but can be used for transmissions. Suitable for vintage, classic, motor sport or industrial applications.

Apply in the same way as a normal oil change -
  1. Run engine to warm existing oil
  2. Drain oil and change filter
  3. Refill with Classic Preservation Oil 20w50 and run for 10-15 minutes
  4. Provides protected storage life of three years if oil is circulated every six months
  5. Allows occasional use for up to 2000 miles, but this reduces storage life
  6. When engine is required for service, run engine to warm oil and drain without changing oil filter
  7. Refill with correct Millers Oil for continual use 

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • Vapour phase inhibitors provide anti-rust performance on working surfaces
  • Resistance to ‘run-off’ during lay-up
  • Vehicles can be driven for up to 2000 gentle road miles
  • Suitable for petrol and diesel engines
  • Can be used and run in gearboxes requiring an engine oil
  • Can be used for storage only in Hypoid final drives


  • Utilises additive chemistry equivalent to API SJ/CC and incorporates additional performance to ensure significantly improved rust and corrosion protection.


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: Mineral