Summer in New Zealand is getting hotter every year, and when temperatures climb above 30°C, many cars start to struggle—higher fuel consumption, weaker air-conditioning, engine heat, noisy cabins, and even potential breakdowns.

To help you enjoy a smoother and safer summer, here are practical, proven tips to make your vehicle cooler, quieter and more fuel-efficient in the heat.

🔥 1. Keep Your Tyre Pressure Correct (Low Tyres = High Fuel Use)

When the temperature rises, tyre pressure naturally increases.
But underinflated tyres are still one of the biggest reasons for:

• Higher fuel consumption

• Loud road noise

• Weaker handling

• Faster tyre wear

👉 Check tyre pressure every two weeks, especially before long trips.
Most NZ vehicles: 32–36 PSI is a safe reference (check your door sticker).

❄️ 2. Use the Air Conditioning the Right Way

Air-conditioning can increase fuel use by 10–20%, but these tips can minimise it:

✔ Start with windows down for 30 seconds

Hot air escapes faster, letting the AC cool more efficiently.

✔ Use “Recirculation Mode”

This prevents the system from constantly cooling hot outside air.

✔ Clean or replace the cabin filter

A dirty filter reduces airflow and makes the AC louder + weaker.

🛢 3. Check Your Engine Oil & Coolant Before Heatwaves

In 30°C+ temperatures, many cars in NZ experience:

• Higher engine noise

• Sluggish acceleration

• Overheating during long trips

✔ Engine oil

Thinner oil in hot weather loses lubrication sooner.
If your last service was over 10,000km or 6 months ago, replace it.

✔ Coolant

Coolant keeps your engine at a safe temperature—even in summer.
Low coolant = high risk of overheating.

🌬 4. Park Smart: Shade, Sun Visors & Windows

This simple step can lower cabin temperature by 10–15°C:

• Park under shade or on the south side of buildings

• Use a reflective windscreen sunshade

• Leave windows slightly open (only safe in secure areas)

🌡 5. Avoid High RPM Driving in the Heat

High RPM driving makes your engine:

• Burn more fuel

• Heats up faster

• Produce more noise

Tips

✔ Accelerate gently
✔ Maintain steady speed
✔ Use cruise control on flat roads
✔ Avoid revving above 3,000rpm unless needed

🚗 Book a Summer Check with MIG CARS

Want your car to stay cool and reliable for the whole summer?
👉 Book a quick inspection with MIG CARS Workshop today.

📞 Contact us | 📍 Christchurch | 🌐 migcars.co.nz