Checking your engine oil takes only a few minutes and no special tools, yet it's one of the simplest habits that keeps a car reliable. Oil lubricates every moving part inside the engine, carries away heat and helps clear away tiny particles of wear. Let it run low, or leave it in place long after it's degraded, and you risk expensive damage that a five-minute check could have prevented.
Why the check matters
Modern engines run tighter tolerances and higher temperatures than older designs, which means oil has less margin for error. Too little oil starves the engine of lubrication under load; too much can cause its own problems, including leaks and increased pressure inside the engine. Checking regularly, rather than waiting for a warning light, means you catch a slow leak or unusual consumption before it becomes serious.
How to check the level
- Park on level ground and make sure the engine has been off for at least ten minutes so the oil has drained back into the sump.
- Open the bonnet and locate the dipstick, usually marked with a brightly coloured handle.
- Pull it out, wipe it clean with a rag or paper towel, then push it fully back in.
- Pull it out again and read the level against the minimum and maximum marks.
- Top up with the correct oil specification for your car, a little at a time, if the level sits near or below the minimum mark — check your handbook for the exact figure and grade.
What the oil is telling you
While the dipstick is out, look at the oil itself. Clean oil is usually amber or light brown; very dark, gritty oil suggests it's overdue a change. A milky or frothy appearance can point to a more serious issue, such as coolant mixing with the oil, and is worth having looked at by a garage promptly rather than ignoring. Also glance underneath the car occasionally for drips, which can reveal a leak long before the dipstick shows anything unusual.
Make checking your oil part of a monthly routine, and always check before a long motorway trip. It costs nothing, takes less time than filling up with petrol, and is one of the most effective ways to protect your engine from avoidable wear.
