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Exocet Octimax - Petrol Fuel Additive (XO2031A)

Exocet Octimax - Petrol Fuel Additive (XO2031A)


Exocet Octimax - 250ml



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  • Description
  • Benefits
  • Shipping Explained

Exocet Octimax - Petrol Fuel Additive (XO2031A)

Exocet Octimax is a specialist petrol fuel additive designed to boost the octane rating of unleaded petrol in order to satisfy the demands of high compression ratio, high performance engines.

Octane is a measure of petrol’s resistance to ‘knocking’ which is sometimes referred to as ‘pinking’. Knocking is due to the fuel/air mixture igniting under compression in another area to that started by the spark plug. The knock sound we hear is shock waves travelling around between the piston crown and cylinder head as the 2 burning mixture zones collide. Knock can occur due to a variety of factors such as high compression pistons, combustion chamber/piston crown deposits in older engines or ignition timing that is too advanced. Increasing octane often reduces “knock”. The problem is very common in engines with a high compression ratio often specifying the old ‘5*’ fuel.  

PDF Downloads:

Download the Technical PDFDownload the Safety PDF


  • Exocet’s OctiMax fuel additive boosts 95 RON regular petrol to 97
  • It boosts 97 RON super petrol to 99
  • It improves acceleration and smooth power delivery


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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