Engine Oil Contamination
Engine oil contamination covers a range of conditions where oil has degraded or been mixed with foreign substances — water, coolant, fuel, or combustion by-products. Any of these reduce the oil's ability to lubricate and protect moving parts.
Call Now: 0800 769 000Types of Oil Contamination We Treat
Water Contamination
Water entered the sump via flood, condensation, or splash. Oil appears milky or frothy. Can cause rust on internal components and bearing failure if run.
Coolant Contamination
Antifreeze mixing with oil following head gasket failure, cracked block, or failed oil cooler. Creates a sticky emulsion that provides no lubrication.
Fuel Dilution
Raw petrol or diesel diluting the oil — common with direct injection engines on short trips, faulty injectors, or over-fuelling. Oil smells of petrol and becomes thin.
Soot and Carbon Buildup
Diesel engines and DPF-equipped vehicles can suffer significant soot contamination, turning oil black and increasing viscosity beyond manufacturer limits.
Metal Particle Contamination
Wear particles from damaged bearings, piston rings, or cylinder walls. A sign the engine has already been running in a damaged state. Requires thorough flush and investigation.
Warning Signs to Watch For
Oil colour change — milky, grey, or foamy
Oil smells of petrol or sweetness (coolant)
Oil level rising between changes
Oil level dropping quickly
Engine knocking or tapping sounds
Oil pressure warning light
Smoke from exhaust (blue or white)
Engine running rough or misfiring
How It Works
Same fee structure as our misfuel service. Your vehicle is towed to a certified workshop. The oil disposal fee covers certified hazardous waste disposal of contaminated engine oil under NZIFDA standards.