About us
We were customers before we were sellers
We tried these treatments on our own gear, watched them save us real money — on fuel, on oil, on repairs that never happened — and reckoned New Zealand deserved the same.
About us
Specialists in Automotive Additives for NZ
A bit about us! Cost Effective Maintenance NZ, previously known as Neptune Products, has been selling in the New Zealand market for over 25 years. Our customers celebrate us through their reviews and satisfaction. In fact, Neptune Products built its excellent reputation by offering a 200% money-back guarantee policy. This guarantee has never been applied in almost three decades of operations. This is thanks to the quality and performance of our product range.
Our Aftermarket Automotive Additives Specialisation
As specialists in aftermarket automotive and machinery additives, Cost Effective Maintenance NZ focuses exclusively on professional-grade solutions. These solutions extend vehicle and machinery life and reduce maintenance costs.
These formulations are designed to solve specific automotive problems. For example, we address engine sludge, fuel system contamination, and exhaust emissions. Additionally, we tackle cooling system failures, drivetrain wear, and hydraulic gear wear.
Our aftermarket expertise means we understand the unique challenges facing New Zealand vehicle and machinery owners. Therefore, we offer cost-effective alternatives to expensive repairs and component replacements.
Our Partnership with Cost Effective Maintenance Australia
This rebranding (from Neptune Products) has come thanks to our new relationship with Cost Effective Maintenance Australia. They are a well-established company that has been providing innovative solutions to vehicle and machinery maintenance challenges for over 30 years.
Moreover, they specialize in products that help reduce maintenance costs and performance issues. Cost Effective Maintenance has built strong relationships with private owners, small fleet operators, and large mining companies. As a result, they ensure continuous feedback and collaboration to improve solutions.
Our Commitment to Excellence
Although operating independently, Cost Effective Maintenance NZ is committed to continuing this legacy of excellence. Furthermore, we are backed by Australian expertise and know-how. This helps us drive improvements in vehicle and machinery maintenance and fuel efficiency throughout New Zealand.
Treatments that pay for themselves.
What we stand behind
We use every product we sell
On our own vehicles and machinery. That's how this whole thing started.
Our guarantee
Our products work, and Neptune Products has shown it for the last 25 years. If they don't work for you, let us know and we'll sort sort it out
Straight answers
Ring us and you get a person who knows engines — not a script. Even if the answer is "you don't need anything yet".
Not sure where to start?
Two questions and we'll point you at the right treatment for your engine.