Why a Standard Oil Change Won't Fix Water Contamination
A regular oil change is not sufficient when water has contaminated engine oil. You need a complete flush — here's why, and what the difference is.
Why Draining Isn't Enough
A standard oil change removes oil from the sump — typically 5-8 litres depending on the engine. But a contaminated engine also has oil in the oil galleries, the oil cooler passages, around the crankshaft bearings, and in the valve train. A simple drain leaves contaminated residue throughout the system, which then mixes with the fresh oil you add. Within a short time, you have contaminated oil again.
What a Proper Flush Does
A proper oil system flush involves draining the contaminated oil, adding a flushing agent designed to clean oil galleries and bearing surfaces, running the engine briefly at idle (only if the source of contamination has been resolved), draining the flush oil, replacing the filter, and then filling with fresh oil. This process removes the contaminated residue from all parts of the circuit.
The Source Must Be Fixed First
Flushing and refilling is only the first step. If the head gasket is still failed, or the oil cooler is still leaking, new oil will be contaminated within hours or days. EEK Mechanical identifies and documents the source of contamination as part of our service — this is what allows you to get a proper mechanical repair done before refilling.
EEK Mechanical's Process
Our oil contamination service is a complete system flush — not just a drain. Your vehicle is collected by tow truck and taken to a certified workshop where the full oil system drain, flush, and refill is carried out to manufacturer specification. Call 0800 769 000.
Related Articles
Vehicle Parked in Floodwater? Steps Before Starting With Water in Oil
If your vehicle has been sitting in floodwater, water may have entered the oil. Learn the safe steps before starting, and how EEK Mechanical recovers it.
Coolant in Engine Oil: Warning Signs and Why You Shouldn't Keep Driving
Coolant leaking into engine oil can destroy an engine fast. Learn the warning signs, why driving worsens it, and how tow-to-workshop recovery works.
Milky Oil on the Dipstick: Causes, Urgency and the Tow-to-Workshop Process
Milky oil on the dipstick signals water in your engine oil. Learn the causes, why it's urgent, and how EEK's tow-to-workshop recovery works in NZ.