Diesel Bug Killer

Diesel Bug Killer

Availability: In stock

  • Controls microbiological contamination

  • Inhibits sludge and slime build up

  • Reduces plugging of filter systems

  • Protects against tank and pipe corrosion

  • 1 litre bottle of Fuel-Guard ‘Diesel Bug Killer’ treats 2,500 litres of Gas Oil / Red Diesel at a killer dose

  • Maintenance fill up dose - 100ml treats 5000 litres (costing approx £2.99)

Product Description


Red Diesel / Gas Oil are particularly prone to microbiological contamination (The Diesel Bug) especially when fuel is stored and untouched for long periods.

‘The Diesel Bug’ contamination occurs from organisms that form slimes in diesel /gas oil fuels. Diesel bugs are in fact microbial organisms and come in three main varieties where fuel spoilage is concerned bacteria, yeasts, moulds and they feed on water, hydrocarbons and nutrients in the fuel.

Water only needs to be available at 100 ppm for bacterial growth to occur and is present in the tank from within delivered fuel and from condensation, hydrocarbons are in the fuel itself and other nutrients come from additives required for the fuel to perform to the required standard.

‘Diesel Bug’ contamination in fuel adversely affects engine performance and can produce brownish-black sludge that clogs-up the fuel filters causing fuel starvation and engine stoppage.

Fuel-Guard ‘Diesel Bug Killer’ is a high performance antimicrobial agent developed specifically to combat problems of microbial contamination and spoilage in hydrocarbon fuels.

One simple dose of Fuel-Guard ‘Diesel Bug Killer’ will eradicate all microbiological contamination allowing your equipment to be up and running in no time at all.    

Delivery & Returns

The estimated time of delivery, whilst given in good faith, is not the essence of the contract. Fuel-Guard shall not be liable for consequential loss or damage, in respect of delayed deliveries due to any reason, and howsoever caused.

Upon receipt of payment, goods will usually be dispatched within five working days and by the most economical means available, If you require a priority service, please contact us for a quotation. Items sent by Royal Mail are subject to Royal Mail Terms & Conditions, most importantly, this states that delivery of items sent 1st or 2nd class can take up to 15 working days.

We are not always able to dispatch same-day but will whenever possible. If we are on holiday, orders will be dealt with upon our return, a holiday notification will be displayed on our homepage whenever we are away and providing you have registered the correct email address with us, an Auto-Respond email will be sent informing you of the situation

If a product is out of stock or has to be ordered specially, then dependent upon the stock situation with the manufacturer, and the location of the manufacturer (some being overseas), delivery could take up to 6 or 8 weeks.

For this reason, if any part of your order is urgent, we encourage you to contact us to check availability prior to purchasing, we will then check stock, and if necessary contact manufacturers and provide you with an expected delivery date.


All prices exclude carriage and packing at the standard rate of £8.50+Vat for delivery to all UK mainland destinations  Scottish Highlands, Scottish Islands, Northern Ireland, IOM, IOW, Scilly Isles, and the Channel Islands will be charged at the rate of £19.50 + Vat per consignment with a weight limit 10 kilos this includes appropriate insurance to the value of the goods. It is recommended that goods are fully inspected upon delivery or signed for as unchecked. Shortages and / or transit damage must be signed for as such on the delivery paperwork, and notified in writing to us within two days of delivery. Claims beyond this period will not be accepted. Collections are not permitted.


Items returned as 'not required' will only be accepted if in new, UNUSED condition, with original, clean packaging and within manufacturers guarantee, all returns may be subject to a 25% restocking charge to cover our administration fees, we will not refund at all for any goods which have been used or soiled in any way. Items sourced to a customer’s specification cannot be returned for credit unless they are suspected to be faulty. All carriage charges must be paid for by the customer but we may reimburse these costs if the goods are faulty and within manufacturer’s warranty. Goods cannot be returned in person unless by prior arrangement. Returned items lost / damaged in transit must be claimed for by the sender.

If you have concerns about a delivery or returns please email us and we will get back to you as soon as possible