Skip to main content

Part Finder

Sierra Fuel Fix Diesel Bug Treatment Fuel Conditioner 250ml Treats Up To 1000Ltrs


Sierra Fuel Fix is the complete fuel conditioner product. It is the latest technology in fuel additives for the elimination and control of contaminants in diesel fuel. Fuel Fix improves power and reduces consumption by as much as 6%. Sludge associated with fungal growth is removed, along with gum and resin build up in injectors and lines. The product will also act as a stabiliser in petrol. Fuel Fix is a cost effective product to add to bulk diesel storage tanks, where prolonged storage periods create ideal environments for the growth of diesel bug. In this situation a large number of vehicles, trucks or machinery may become contaminated from filling from a single source. If the source is continually treated all equipment filling from the source will benefit from the product.

Sierra’s Fuel Fix is a highly concentrated additive for the elimination and control of bacteria, fungi and water contamination in fuels. Utilising the latest in microbiological controls and surface active agents, water and biological contamination is harmlessly dissolved and dispersed into the fuel, and subsequently burnt off. Bacteria and fungi such as the common air borne spore Cladisporium Resinae appear as dark “sludge” like particles in the fuel reservoir. At their worst this “sludge” can amount to large lumps or mats.

Unlike the many biocide treatments that are on the market that are only designed to kill bacteria, not remove and are of no use in removing water, Fuel Fix will remove the entire problem.

Fuel Fix can be safely used with diesel engines that run a particulate filter, in fact it will improve the efficiency of particulate filters, by dissolving any occurrence of the diesel bug. Fuel Fix will not affect seals, hoses and fittings within the fuel system. Regular use will eliminate problems associated with condensation, and prevent further biological growth from occurring.


  • Improved fuel economy
  • Smoother acceleration
  • Improved power
  • Improved fuel flow (especially through filters and injectors)
  • Left untreated, moisture in the fuel tank will eventually cause corrosion, leading to even more problems.
  • Petrol fuel stabilisation


  • An initial dosage of 2 litres for every 1000 litres of fuel is recommended to thoroughly purge the fuel system of all contaminants.
  • Regular subsequent dosage can then be reduced to as little as 1 litre for every 4000 litres of fuel. At this level of 1:4000, fuel quality will be maintained, condensation will be absorbed, and biological growths will be prevented.
  • If necessary, a maximum dosage of 5 litres may be added for every 1000 litres of fuel, where bacterial/fungal growth is inhibiting the flow of fuel through the system.
  • In all cases, Fuel Fix should be added prior to the addition of the fuel.
  • Since Fuel Fix will attack the existing ‘bug’ that is present, initial dosing will require more frequent cleaning/replacement of filters in the system to avoid blocking.
  • Ensure that all efforts are taken to drain high levels of water first (where possible).
  • Initial dosage rates only have to be administered if contamination is present. If using as a preventative measure please use maintenance dosage rates.

Download the Product Bulletin for Sierra Fuel Fix
Download the SDS Sheet for Sierra Fuel Fix

Sierra - Specialised Products

Sierra (Aust) is Queensland owned and operated from their modern factory and processing plant at Geebung - Brisbane. The company commenced business operations in July 1991 and has continued to expand it's manufacture and distribution of vehicle detailing products and workshop consumables to clients throughout Queensland and Australia. With strong links in both national and international markets Sierra (Aust) has become a recognised leader in the design, testing and production of superior quality products suitable for our harsh Australian conditions.

Please make sure that you are ordering the correct parts for your vehicle. If you're not sure or don't know, please contact us. Provide us with the VIN#, YEAR, MAKE, MODEL of your vehicle and we will double check and verify fitment for you. So that we can avoid any wrong parts ordered and returns. Any parts ordered incorrectly return postage will be at buyers' expense. Please see our terms of use.

SKU N186
Model # FF250
Shipping Weight 0.2800kg
Shipping Width 0.100m
Shipping Height 0.200m
Shipping Length 0.060m
Shipping Cubic 0.001200000m3

Be The First To Review This Product!

Help other FCP Solutions users shop smarter by writing reviews for products you have purchased.

Write a product review

You May Also Like

Others Also Bought