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02 6351 3666


168 Bells Road, Lithgow NSW 2790

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InterJect is the Best Fuel System Cleaner

It's what our customers say... and they love our interject fuel system cleaner!...  (because it works!) and it's due to Interject being an organic solvent that goes straight to the bottom of thefuel tank, where the water is, and helps get rid of it, safely!!

Why does water get into the fuel tank??

The fundamental reason for water getting into the fuel tank is because all tanks have to breathe when fuel is used up, at certain times say when it's raining or areas of high humidity, or during winter times when there are fogs, etc. we find that the opportunity for water to get into the fuel system is very high. The Moisture will pool over a period of time and start to cause trouble when running very low, and it can get into the delivery pipe. Interject totally prevents any water contamination problems.

Interject Fuel System Servicing

At 168 Bells Rd. Lithgow 2790  call us on 6351 3666


For the best interject fuel system cleaner, you can always rely on us as we have been using the Interject Fuel System Servicing Technique for over 35 years. For the last number of years, we have also been involved in  and supporting other workshops, not just in NSW but in the other States of Australia.

WE have recently rescued our special 1800 724 007 number and when you call it, you will be directed to Harry Holzmann...

Please call 1800 724 007 for all matters about FuelMate, Interject or IJ Servicing Chemicals...

We want to wish all our customers and friends prosperity for 2024, and if you need our help after hours and if we are able, we would like to help?

                 Harry 0412 399 553; Brad 0404 490 604;

Best Fuel System Cleaner

Our success and subsequent customer satisfaction  due to our Interject chemicals cleaning the injectors and the inlet valves to ensure good engine breathing. The performance is always better than removing the injectors and just cleaning them alone, and depending on the vehicle, also be much cheaper. 


For any workshop wanting to get involved in doing your own fuel injection and Fuel System Servicing, give Harry a call anytime on 0412 399 553

The benefits of "On the engine Injector Cleaning" we also provide  complete "Fuel System Service" provides:-
  • Better fuel economy
  • Increased power
  • More torque
  • Cleans the fuel rail and fuel lines, & fuel tank
  • Longer engine life
  • Exhaust emissions can be reduced
  • Saves you money
  • Prolongs fuel pump life
We also recommend that you use InterJect (used to be labeled Interjectron ) (Fuel Tank Additive) in your "Fuel Injected" vehicle every 6 months or 10,000kms (especially important, if you use Ethanol) to prevent problems with the  or fuel contamination, to help maintain it, and    it costs you less, and lasts much longer.
Special WARNING in regards to using Ethanol Blended fuel:- Due to Ethanol having an affinity to moisture, using ethanol in older Fuel Injected cars may produce problems as there will be moisture in the bottom of the fuel tank (this is a normal situation, due to the tank being vented to atmosphere and moisture gets in when the fuel is being used) Simply add 2 bottles now, and use a bottle of Interject at every service or 5,000kms....... Don't get caught with a rusted fuel system as the fuel company won't pay for the the experts know that fuel tanks rust from the inside and the moisture gets in as fuel is used up!!
Just use Interject... and water contamination and damage from ethanol will be a thing of the past.
Please be aware..."We do not recommend the use of fuels in early cars, especially where cork gaskets are in the fuel system, as in the fuel pump,  . and as a general rule, to be safe, if it's a carburetor use only  Premium fuel"

WE have recently rescued our special 1800 724 007 number and when you call it, you will be directed to Harry Holzmann...

Please call 1800 724 007 for all matters about FuelMate, Interject or IJ Servicing Chemicals...



EFI or Electronic Fuel Injection

Modern vehicles are designed to produce less pollution. This has been accomplished by means of EFI, and the  vehicle does not have a traditional carburettor EFI may seem to be more complicated, but in  they have a simple structure. They usually give many years of  operation, BUT, It is important to observe some basic maintenance procedures. This is where Inter-Ject can help you, and it can save you money.


How EFI works

The brain of the EFI system is an ECU (Electronic Control Unit) This unit analyses the sensors on the engine, and it alters the timing of the injector openings, depending on the conditions outside ie. cold start, acceleration,  ...MP or Multi-Point is the most common type of system used. Each intake port has its own injector. 
Advances in fuel injection computer technology  made engines even more efficient, but it doesn't matter what type of computer control there is, we are still having to deal with (at times) substandard fuel quality or contamination...
"Using InterJect on a regular basis will enhance the way the fuel behaves and is burned in the combustion chamber."
Interject is also great in and diesel engines... call Harry or Brad and discuss your needs with them.

EFI Fuel Filter

This is your first defence against polluted fuel. It's very important that you change this filter regularly.
The idea of the fuel filter is to remove the destructive contaminants before it gets a chance to get to your injection system. 

Very common EFI problems

The worst problem is contaminants reaching the injectors, or water in the fuel system. This can cause poor behaviour which will affect the  and give high pollution readings. Some of the problems include:
  • Solids entering the fuel during filling the tank
  • Condensation produced due to normal tank venting.
  • Using contaminated drums for storing fuel
  • Tarnish build-up
  • Running low on fuel or running out of fuel.
  • Neglected injectors causing due to lean running
  • Dual Fuel Engines often have trouble running on petrol


 Inter-Ject can fix the problem

To help clear tarnish and build-up of deposits, use the Inter-Ject additive regularly (every 6 mths or 10,000kms), (especially important if you use Ethanol as Interject will remove the water from the fuel) and have our comprehensive "Fuel System Service" done every 2 years or 30,000kms or when problems come up, like missing or poor behaviour.

Total Fuel System Cleaner

The Inter-Ject Fuel System Service is also effective on Diesel engines, where good engine breathing due to cleaning the intake valves will reduce smoking, and improve engine performance. (Check out the procedure & info in the servicing sections below)

Technical Information Resources:- (These mainly benefit )

Most of the following information is mainly for Trades People, but everyone is welcome to check these out:- 

Interject Workshop Trade Support...

If you are a workshop and want to become an InterJect Reseller or Service Centre, OR... you have one of these machines, not being utilised (as mechanics come and go), we can refurbish the Interject Servicing Unit (the seals on the flow meters and hoses go hard with age and when not used) and provide quality training on "Fuel System Servicing"
We can train and support your current staff, in your workshop at a time that suits you.
please give Harry a call on 0412 399 553,
There is also information on the Interject website:-  
 All the Interject MSDS information is available there as well:-

"Extract from the Site"

"The Inter-Ject fuel tank additives and diagnostic equipment are the solutions to all fuel system faults and problems. It is unlike any other system available in the marketplace. Inter-Ject is the only system that treats the entire fuel system from the tank to the combustion chamber. "

and... "In all hydrocarbon fuels, (petrol, and diesel), small proportions of Sulphur Dioxide are present. When Sulphur Dioxide comes into contact with moisture, unavoidable in any fuel system, they combine to produce minute quantities of sulphurous acid. This causes the  of corrosion, resin, and carbon. Inter-Ject chemicals neutralise  , suspend water, and remove resin and carbon. Restricted airflow, due to resin and carbon, is the single most important reason for lack of engine performance. The Inter-Ject system allows the technician to turn a normal tune into an environmentally friendly tune, which reduces vehicle emissions."

Do you have any questions? Contact us via email here!

Interject Service Centres that we support, able to look after their clients...

Special Thank you to Kevin Porter, Past Service Manager of Bathurst Mazda, who was able to carry out the Interject Fuel System Servicing and further enhance their customer's satisfaction in today's demanding service environment, where looking after the customer is the number one priority.
Special thanks to Kevin Porter, who has just recently (as of January 2018) decided to move on to other pastures, with best wishes and good luck for the future from Harry Holzmann, at BMFI,
mate and good luck with everything!!

WE have recently rescued our special 1800 724 007 number and when you call it, you will be directed to Harry Holzmann...

Please call 1800 724 007 for all matters about FuelMate, Interject or IJ Servicing Chemicals...

Then we have Shane Jones Performance and Phil and Cheryl at AutoCheck Mechanical Repairs, in Bathurst with this equipment.
the Fuel System Servicing is now available at Mayne Street Automotive, Gulgong.
The NRMA Service Centre at Kandos also has the Interject Machine.
Also Webb's Service Centre at Junee,
Also James Brown Automotive, In Bateman's Bay
Also Ken Booth Automotive Repairs in South Penrith,
Also R&R Performance in Cowra,
Also Auto Check Mechanical Repairs, Coreen Ave. Penrith;
Also West Cowra Autos,
Also Richard Sheard Windsor all Car Tuning;
Also Gunning Service Centre;
Also Tim Bowen, BKB Motor Vehicle Repairs at Eastwood;
Also Andrew Humpries, First Choice Mechanical Repairs in Wollongong.
 All these Service Centres are able to perform the beneficial Interject Fuel System Service,
if you are a workshop and interested to join them please call:-
Harry on 0412 399 553;
and... if you are a customer who wants to know what benefits there are in the
Interject Fuel System Servicing, Call Harry as well.
For website quick loading all images are in lower resolution, but, you can enhance these images?
"Just Click on any images on this or any page and they will open in more detail"
New Fixed Single perspex cover protects the system flow and Injector flow units.
Back of new twin flow unit 2009 modification

Refurbished Twin Flow Unit to New InterJect Style

Special Information for other workshops that may have an  INTERJECT Servicing Unit...

We can provide the support and technical backup
The above 2 photos on the left, show the LB291-2F flow unit with a new perspex front cover replacing the existing 2 slides on covers that tended to deteriorate with the fuel, etc. The photo on the right is the new design twin flow meter, which we can convert your existing flow unit to this new style for a bit more versatility.
Using the machine without flow meter protection could be costly if you bump the flow glasses and they develop a crack and leak.
(We do have replacements and can refurbish your existing machine with 12 months guarantee)...  (conditions apply)
P.S. If the equipment is not used for some time the "O" rings tend to harden up and may leak... They might stop leaking once the hot fuel swells the "o" rings, but this is a sign that they really need replacing and we have kits available for these, please give us a call... 0412 399 553 (Harry) (MIAME)
If you have one of the old Interject Machine's just sitting around collecting dust you are potentially throwing away money. We can show you how to service and look after your customers who will be glad you took the trouble to encourage them to have a "Fuel System Service" done on their car.
We love supporting other workshops and can come to you to train your "new"
mechanic, or just a refresher course, and show you how profitable it can be to do "Fuel System Servicing" but especially for your customer's extra satisfaction.
With today's Ethanol Fuels, the need for "Fuel System Servicing" is greater than ever.
Also promoting the use of the Interject chemicals is so important to be able to prevent rusting of the fuel system.
Don't leave your customer's satisfaction to chance...
Be the one to promote Interject and really look after them. Call us today!
We also have posters and customer information for your office area available to help you
Most of the following information is mainly for Trades People........ 

WE have recently rescued our special 1800 724 007 number and when you call it, you will be directed to Harry Holzmann...

Please call 1800 724 007 for all matters about FuelMate, Interject or IJ Servicing Chemicals...

to market Interject to your customers (and also for customer handouts) Just call Us!
Western Sydney Interject Training Facility...
We used to have regular teaching seminars to do with the InterJect Servicing techniques and it was quite popular just a few years ago... We are going to get these happening again... If we get a  of 6 participants we will put on a Saturday afternoon Training Seminar, here at our Dyno Workshop in Lithgow. The cost is $140.00 per person, and it comes complete with handouts and notes that you can use back in your workshop. And we also provide refreshments!
Get a bunch of your mates together and we can have some fun and help you make some extra money by getting the best behavior from your customer's vehicles.
Register your interest with us by calling Harry on 0412 399 553, or Brad on 0404 490 604;,  or leave a message on our workshop phone.. 02 6351 3666 if we are away from the office.
Images below depicting our DATAMECHANIC Workshop Program

DataMechanic Main Page

Unlimited amout of Customers on the database and this represents heaps of customers for say a dealership.

Customer Information Page

DataMechanic Invoice Page with all details kept in History etc.

If you haven't had a chance to become familiar with InterJect, you might not know that you can easily overcome water in the fuel tank by just adding InterJect. Removal of fuel tanks to overcome this problem is not required.

We always use Interject when we replace a fuel pump to be sure the tank is clean


 How the interject mixes with water.

 Click on the above file and download this information!

These logos are loaded in Low Resolution for quick loading, Click on them for proper resolution.


Images below depicting our DATAMECHANIC Workshop Program

Spare Parts Page with detailed information showing past buying history of individual parts!

One of the reports pages of Many that are available on the Database.

Detailed Invoices reports page, Statements and other usefull information to determine what monies are owed and how your business is travelling?

DataMechanic Trade Support:-

I have been marketing and supporting the fantastic DataMechanic Computer Program developed by Keith Craig in Londonderry, with input from many workshop sources as well as myself, now for over 34 years.

Keith and I went to school together and it's just great what he has achieved.

If you are looking for more control, easier book-keeping, and Great Looking Invoices, check out the DataMechanic program...

What we considered important when Keith put this program together.

  • Must be easy to use, as mechanics have more pressing things than become computer experts.
  • Detailed information about each vehicle for easy parts ordering.
  • Detailed History, the same as the invoice content, not abreviated. 
  • Invoices are editable, in case you forgot to charge for the air filter, etc.
  • the same applies if you forgot to mention what is required at the next service (Although I also like to speak to my customers when they pick up their and mention things that need to be attended to at the next service or so.)

with the advent of modern technology, we can also adjust and backup in real-time  TeamViewer-11.

DataMechanic Comes on a data stick for remote set-up but we do provide a quick training of how the program runs, usually just 2 hours.


cost of DataMechanic, complete with personalized Invoicing, Spare Parts Control, Statements details, marketing messages, etc, is $1395.00 including GST. (Tailor made with your Logo and Business Details)

Call Harry on 0412 399 553


Above we have just some of what the DataMechanic program entails and these Images are loaded in Low Resolution for quick loading, Click on them for proper resolution.


 These Images will only give you a sneak at what is a great program... If you are interested to gain more control of your workshop, with neat looking invoices, a demo from me and I can explain it in much more detail.