JLM Lubricants

JLM Engine Oil Flush Heavy Duty


 / 1000ml

  • Cleans cylinder walls, pistons, rings, valves lifters
  • Cleans upper cylinder area
  • Removes gum, varnish, sludge, carbon deposits, soot & liquids
  • Improves fuel efficiency & engine performance
  • Maximises effects of fresh engine oil
JLM Engine Oil Flush Heavy Duty J04836 JLM LUBRICANTS

JLM Engine Oil Flush Heavy Duty is an aftermarket chemical additive designed for use in HDV’s (incl. trucks, semis, heavy machinery and stationary engines) This oil-based product is designed to clean accumulated deposits, sludge, gum and varnish from the engine before an oil change. 1 litre will treat 20 to 40 liter engine oil.

Product information

For all HDV gasoline, diesel and LPG engines with or without turbochargers. Compatible with all mineral, semi synthetic or fully synthetic motor oils.


Shake before use! For professional use only!

1. The engine must be at operating temperature!
2. Before changing oil, pour the contents of one bottle in the crank case  of the engine
3. Let the engine run on idle for 15 minutes, alternatively at low and high rpm.
4. Drain the oil from the crank case.
5. Replace oil filter.
6. Refill crank case with recommended fresh motor oil.


One bottle of 1 litre treats 20-40 liter of motor oil.

Favicon JLM Lubricants grey

JLM Lubricants

Great addition

"This is a great addition to the products in my workshop. We continuously see fantastic results in the recovery of emissions and engine performance, among other things."

- Paul Finn

JLM Lubricants


"I was very skeptical, but after using the product and starting my car, I couldn't believe my eyes ... the yellow light in my car was no longer on!"

- Kevin Kalo

JLM Fixing cars

Surprising­ly good

"I never thought that JLM would surprise me so much. It gets better and better every time. I will continue to use these products. The fantastic results speak for themselves. Keep up the great work."

- Andrew Watts


These are the most common questions we get.

Do any of the JLM additives help the performance of the high pressure diesel fuel pump?

J02330 Rapid is perfect for pump and injectors!

Is it OK to use the JLM Extreme Clean and the DPF Cleaner together?

No, this will not have a positive effect. In fact it may cause an adverse effect. And also the risk of overdosing! Never combine fuel additives


Will JLM Bluboost dissolve existing crystal infestation or is it more like a preventative product?

JLM’s Bluboost additive cleans and prevents crystal formation in the AdBlue® dosing system. It also conditions the AdBlue® fluid for a longer time to ensure proper working of the AdBlue® and SCR system. This helps prevent performance loss and the often-subsequent expensive repairs. It also reduces foaming at low temperatures

Is the JLM Engine Oil Flush safe for use with wet belt engines?

Our JLM OIL FLUSH is safe to use with ‘wet belts’ (TBIO). This is mainly because we use non solvent and premium pack of oil cleaning additives.


Does the Petrol Emissions Reduction Treatment also clean the catalytic convertor?

The catalytic converter is not a filter, it functions by converting harmful emission gases into less harmful gases. The filter can become contaminated if for example there has been an oil leak, and when this happens the filter needs to be replaced. There is no additive or chemical that will remove physical contamination from a catalytic.

Go to Top