Now that summer is here, a lot of drivers assume their car has an easier life than it does during winter. And in some ways, that is true. Engines warm up quicker, batteries cope better in mild temperatures and there are no freezing early mornings to deal with. But there is one thing that can still quietly wear a car down at any time of year, and that is short daily trips.
Quick drives to the shops, the school run, the gym or a nearby coffee shop might seem harmless, especially in warm weather. The reality is that lots of short journeys can slowly put extra strain on a vehicle without most drivers realising it. If your car is mainly being used for journeys of ten minutes or less, it may not be getting enough time to properly warm up and run as it was designed to.
What is a micro journey?
A micro journey is any trip where the engine barely reaches normal operating temperature before the car is switched off again. In most cases, this means drives of less than five miles. Modern cars are built to work best once everything has fully warmed up. On very short trips, several important systems simply do not get enough time to do their job properly.
Why short trips can still be hard on cars in summer
The battery does not fully recover
Starting a car uses more battery power than many people realise. On a short trip, the alternator may not have enough time to replace the energy used to start the engine, particularly if the air conditioning, lights, phone charging and infotainment system are all running.
Over time, this can leave the battery slightly undercharged more often than it should be. Eventually, that can shorten battery life and increase the chances of starting problems.
The engine oil may not get fully hot
Engine oil works best once it has properly warmed through. During repeated short drives, the oil may stay cooler than intended, which means it does not circulate quite as effectively around the engine.
Moisture and small amounts of fuel can also build up in the oil if the engine rarely stays hot for long enough. This is usually more noticeable in winter, but it can still happen during summer if the car only does very short runs.
Exhaust systems still need heat
Although condensation is less of a problem in warm weather, moisture can still collect inside the exhaust system after start-up. Longer journeys normally burn this away, but repeated short trips may not give the exhaust enough time to dry out fully. Over a long period, that can contribute to rust and corrosion.
Diesel cars can struggle even more
Short trips are especially difficult for diesel cars fitted with a diesel particulate filter, known as a DPF. The filter needs high exhaust temperatures in order to clean itself properly.
If the car mainly does short journeys, the filter may never get hot enough to complete that cleaning process. Eventually, this can lead to warning lights, reduced performance and expensive repair bills.
Brakes and tyres wear differently
Cars that spend most of their time on local roads tend to deal with more stopping, turning and low-speed driving than cars used regularly on motorways.
Roundabouts, speed bumps and stop-start traffic all place more demand on brakes and tyres. In some cases, a car that only does local errands may need brake work sooner than one covering far higher motorway mileage.
What drivers can do
Give the car a longer run now and then
A steady 20 to 30 minute drive every couple of weeks can make a real difference. It allows the engine to fully warm up, helps recharge the battery properly and clears moisture from the exhaust system. Summer is actually one of the best times to do this.
Avoid unnecessary electrical use on very short trips
If you are only driving a couple of miles, it can help to avoid using electrical features you do not really need. Air conditioning, heated seats, powerful fans and charging devices all increase demand on the battery.
Keep up with servicing
Cars that mostly do short journeys often benefit from regular servicing just as much as high-mileage vehicles do. Fresh oil, a healthy battery and routine checks can help prevent many common issues linked to repeated short trips.
Consider a battery charger
If your driving is almost entirely local, a smart battery charger can help keep the battery in good condition between journeys.
The bottom line
Summer weather does help reduce some of the stress caused by short journeys, but it does not remove the problem completely. Repeated cold starts, stop-start driving and limited engine warm-up can still slowly wear a car down over time, even in warm conditions. Sometimes the best thing you can do for your car is simply take it for a proper drive instead of another quick run around the corner.
