Why your car feels sluggish when you turn it on – then suddenly smooths out
By Dan Kauna, May 4, 2026You start your car in the morning, and something feels off.
The engine sounds rough, the ride isn’t as smooth, and for a moment, it almost feels like your car is struggling. Then, just a few minutes later, everything settles.
The drive becomes smoother and quieter. Normal again.
If you’ve experienced this, you’re not alone. It’s something many drivers deal with daily, especially during colder mornings or after the car has been sitting for hours.
So, what’s really going on?
Your car is simply ‘waking up‘
Just like people, cars don’t always perform at their best immediately after starting.
When an engine is cold, several things are happening at once. The oil, which keeps everything running smoothly, is still thick and hasn’t fully circulated.
Fuel doesn’t burn as efficiently, and the engine’s system is still adjusting to reach the right operating conditions.
That’s why the car might feel slightly sluggish or uneven at first. It’s just warming up.
Why it feels more noticeable some days
If you’ve ever felt like your car is slower to “catch up” on certain mornings, you’re probably right.
A 2020 study in the journal Energies found that during a cold start, combustion behaves differently, including longer ignition delays and less efficient fuel burning.
Cooler weather can make engine oil thicker, meaning it takes longer to move through the engine. If your car has been parked overnight, everything has had time to cool down completely.
Short trips don’t help either. If you’re driving just a few kilometres (say, a quick run into town) your engine might barely warm up and reach its ideal temperature before you switch it off again.
Do modern cars still need to warm up?
Not in the way many people think.
Older cars often needed several minutes of idling before driving. But modern engines are designed to warm up faster. In fact, most experts recommend driving off gently after about 30 seconds instead of letting the car sit and idle for long.
It saves fuel and it’s better for the engine.
When should you be concerned?
A brief rough start is normal. But if your car takes too long to smooth out or continues to feel unstable, it could be a sign of something more.
Watch out for persistent jerking, repeated stalling, poor fuel consumption and warning lights on the dashboard.
These could point to issues like worn-out spark plugs, old engine oil, or sensor problems.
How to make it easier on your car
You don’t need to do much; just a few simple habits can help. Avoid revving the engine immediately after starting. Drive gently for the first few minutes after turning on the vehicle.
Do not neglect servicing, make sure it is regularly done. And use the right engine oil for your car
The bottom line is, that rough start you notice in the morning isn’t usually a problem – it’s just your car getting ready for the day.
But if it starts taking longer than usual to “settle,” it might be your car’s way of telling you it needs a little attention.