Why a Standard Oil Change Won't Fix Water Contamination

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.