HYDRA VULCAN - Heating Oil Additive
Pack Size: 100mlPack Size: 250mlPack Size: 500ml
Pack Size: 1 LitrePack Size: 5 Litre

HYDRA VULCAN - Heating Oil Additive

Our Price:  £15.65
(Inc. 20% VAT)(£13.04 Exc. VAT)
Pack Size:

Fuel Additives Problem Solver

  (26 Reviews)
  • Contains heavy duty detergents, which will clean injectors and burners.
  • Dissolves sludge in fuel tanks and removes accumulated soot deposits from the system.
  • Because combustion is improved, fuel consumption is reduced.
  • Use in all boilers.
  • Upgrades standard kerosene into premium grade.
  • 250ml treats up to 1,250 Litres.

Brand:  HYDRA




  • Promotes a cleaner boiler by incorporating the latest technology in heating oil additives with heavy-duty detergents. These detergents clean down to a molecular level, cleaning burner nozzles, injectors, and fuel lines.
  • By ensuring that all of your fuel system is clean and running at its peak efficiency, the overall efficiency of the boiler giving better fuel economy.
  • Most fuel tanks will get a build-up of sludge over time, the sludge dispersants in Hydra Vulcan will dissolve this harmful sludge.
  • Stabilises the fuel by inhibiting further sludge formation, keeping your fuel lines and filters clear, an essential requirement for a heating oil additive.
  • Turns regular fuel into premium kerosene. It gives a greener, cleaner burn, reducing maintenance and boiler shutdown.
  • Pays for itself by reducing maintenance and giving greater fuel economy.


Add to fuel tank, then top up with new fuel. It can also be added to fuel already in the tank. After adding to your tank, just give Hydra Vulcan a quick stir with a stick, and it will readily disperse.

It can be used in all grades of kerosene and heating oil.

For A Heavily Contaminated Fuel System

Dilution rate: 1:2500, i.e., 250ml treats 625 litres of fuel.

Refuelling Dose to Protect A Clean Fuel System

Dilution rate: 1:5000, i.e., 250 ml of treats 1,250 litres of heating oil. Treat oil tanks every time they are topped up.


Many heating boilers are of a pressure jet design that use precise fuel metering through narrow-shaped spray channels. Injector deposits mean reduced fuel flow. Whereas 100% clean injectors give optimal fuel spray pattern. Each finely dispersed particle of fuel is surrounded by many molecules of air (20% oxygen), ensuring a more complete burn, giving you better fuel economy, reduced emissions, and improved boiler durability.


Hydra Vulcan contains heavy-duty detergents that prevent the formation of and removes existing deposits from burners, injectors, and heat exchangers In the oil tank. It safely dissolves years of corrosive sludge into the fuel where it's burned away. Vulcan creates a protective barrier to help prevent the sludge build-up from coming back, giving you the best heating oil additive that money can buy.


When using Hydra Vulcan additive for heating oil, it upgrades standard heating oil to a premium standard for heating oil. The boiler fires easier with reduced soot and fuel consumption. Better combustion means fewer deposits on burners and heat exchanger.


 All of our products are manufactured to the highest specifications at our UK plant, which is accredited to ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018.


FPB-77 Fuel Plus Treatment and Heating Oil Lubricant

Can I mix Hydra Vulcan if I have an additive already in my tank?

You will be OK as long as the other additive has been designed for domestic heating boiler oil treatment. Just dose at the correct amount for your volume of oil.

Will using Hydra Vulcan affect my boiler warranty? 

Our product has been designed so that treated fuel still adheres to the following standards: BS 2869Class A2 and BS 2689 Class D; therefore, it will not affect your boiler's warranty.

Is this used for putting straight into the home heating oil tank which feeds the central heating boiler only?

Yes, Add Hydra Vulcan heating oil additive straight into the oil tank in the correct dilution, then top up with new fuel. Please make sure that the Fuel tanks being treated are at least 10% full.

I've just replaced my oil tank, but although a lot of sludge was removed, some contaminated oil was transferred back to the new tank. If I'm adding the Hydra Vulcan to the fuel, do I need to add a biocide additive as well, or will the Heating Oil Additive do both jobs?

To play safe we recommend you to add the biocide Hydra FPB-77 FuelPlus as well.

Hi, is the amount of heating oil additive critical ie if I buy some? Is it possible to add too much?

No. If you overdose it is OK.

Hi. Can I just check this is for kerosene? Also, why two lids? Thanks

Yes. One is measuring cylinder & other one is direct pouring.

Can I add it to my inverter heater?

 Yes, you can.

Is this compatible with a condensing oil boiler?

Yes it is.

Average Rating (26 Reviews):  
Write a Review and share your opinions!

17 February 2022  | 

Thank you very much, fast delivery and arrived with the right timing of my oil delivery.
Thank you again.
Brilliant service, will be back next time.


This review has not been appraised.

Outstanding additive
04 January 2022  | 

This is an outstanding additive and I use it every new delivery of heating oil

Was this helpful to you?  Yes  /  No

1 of 1 people found this review helpful.

The Ultimate Heating Oil Additive
26 November 2021  | 

No need for a long waffle. The product is OUTSTANDING.

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This review has not been appraised.

13 November 2020  | 

Have been buying fuel additive from hydra for some time now. Excellent service and the additive really helps zx


This review has not been appraised.

Heating oil additive
26 January 2020  | 

Certainly makes a difference


This review has not been appraised.

heating oil additive
17 December 2019  | 

Very speedy response and delivery.
Additive well packaged.


18 of 18 people found this review helpful.

Heating oil additive
12 December 2019  | 

Had my boiler serviced & was recommended to use an additive as there was some sludge in the bottom of the tank. Since adding Hydra the water & heating seems hotter & the needle on my oil level gauge seems to be going down slower. Not sure if it's just down to the Hydra, but there's definitely a difference. Will be adding it every tank fill now.

Was this helpful to you?  Yes  /  No

2 of 2 people found this review helpful.

28 August 2019  | 

Thank you for your enquiry regarding my purchasing experience as a customer of Hydra-Fuel Additives.

I have made a number of purchases over recent years and have the process to be easy, efficient and timely in terms of delivery.

The product seems to be effective in my oil burner and I shall no doubt order some more in about three months.


19 of 19 people found this review helpful.

Top shop
20 August 2019  | 

Promptly delivered, good product at a decent price


24 of 24 people found this review helpful.

Boiler running more quietly
16 July 2019  | 

Have had problems with my boiler sooting up, and playing up like only firing up for a few seconds at a time. Have had it serviced/cleaned 3 times in the last 7 months. So have had it serviced again and also added this product to the oil tank. So will have to wait and see if it works the only thing I can say the boiler is much quieter and working as it should.


This review has not been appraised.

Read all 26 customer reviews...

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