Flushing Oil Concentrate | Full Engine Cleaner
Flushing Oil Concentrate is a professional-strength engine oil flush that deep-cleans your engine before an oil change. It removes sludge, carbon buildup, and varnish deposits — restoring oil flow, improving compression, and giving your new oil the cleanest possible start.
DEEP-CLEAN YOUR ENGINE BEFORE EVERY OIL CHANGE
What's Hiding in Your Engine's Oil Passages?
Every time your engine runs, combustion byproducts and oil breakdown create sludge, varnish, and carbon deposits that accumulate in oil galleries, piston rings, and valve train components. Over time these deposits restrict oil flow, stick piston rings, and rob your engine of compression — leading to increased oil consumption, loss of power, and hard starts.
A standard oil change doesn't clean these deposits. New oil simply mixes with the contamination left behind, compromising its effectiveness from the start.
Flushing Oil Concentrate is a super-concentrated formula designed to be added to your old oil before draining. In just 10–15 minutes of idle running, it dissolves and suspends sludge, carbon, and varnish deposits — which drain away with the old oil. What's left is a clean engine ready for fresh oil to do its job properly.
Key Benefits:
- Removes engine sludge, carbon buildup, and varnish deposits
- Frees sticking piston rings to restore compression and reduce oil consumption
- Reduces exhaust smoke, oil use and blowby
- Restores engine performance and efficiency
- Faster, easier cold starts after treatment
- Suits petrol and diesel engines
For best results, use Flushing Oil Concentrate at every oil change — especially on high-mileage engines, vehicles with extended oil change intervals, or any engine showing signs of sludge, high oil consumption, or power loss.
Simply add to your old oil, idle for 10–15 minutes, then drain and refill as normal. It's one of the highest-value things you can do for your engine's long-term health.
Dose rate
250mL of Flushing Oil Concentrate for 20L of engine oil
In stock — NZ-wide delivery · simple returns · questions? Call us
How to use it
Honestly, this is the whole job:
- 1
Measure the dose
Use the dose rate on the label — the bottle cap is your measure.
- 2
Pour it in
Add it to your fuel or oil at fill-up or service. No workshop, no tools.
- 3
Drive as normal
The clean-up happens while you work. Most people notice a difference within two to three tanks.
Precautions — the straight talk
- Keep out of reach of children. Not for drinking — it's engine treatment, not cordial.
- Avoid skin and eye contact — wash with water if it happens. Gloves are a good idea when dosing.
- Store sealed, upright and away from heat or ignition sources — treat it like fuel.
- Stick to the dose rate on the label — more isn't better, it's just wasted product.
Safety Data Sheet (SDS)
The full safety and handling details, PDF format.
What it's done for others
Reviews from customers of Cost Effective Maintenance Australia — our parent company. Same products, 30+ years of results, now here in NZ.
"2006 Hilux, 285,000 km on the clock. Smoked on every hill. Two tanks and it's gone — and it's using less oil between services now."
"Run it across our five Rangers for 18 months. Cold shifts are smoother, the noisy diff went quiet, and the fuel cards show it on the long hauls."
"I tell customers most additives are snake oil. Ran it through a sludged-up Territory before its service — what came out in the drain pan told the whole story."
It pays for itself
A cleaner engine burns less fuel, uses less oil and puts off expensive repairs. One bottle costs less than an hour of workshop time — and you don't have to book anything.