`

You should change your engine oil every 5,000 to 15,000 kilometers, depending on the oil type, your driving conditions, and your vehicle. At Biswas Automobiles, we check each of these factors before recommending the right oil change interval. Many drivers in Dhaka either wait too long or change oil more often than needed, and both can be bad for your engine or your wallet.

Your engine needs clean oil to work properly. The oil keeps the parts inside the engine moving without friction. It also cools the engine, removes dirt, and prevents rust. Over time, the oil wears out. It gets thick, dirty, and loses its ability to protect the engine. That’s why regular oil changes are a must. If you ignore this, your engine may lose power or break down completely.

We always recommend checking your vehicle’s manual. But real-life driving conditions in Dhaka are rarely ideal. That’s why we help you plan your oil change schedule based on your car, the oil used, and how you drive.

Why Engine Oil Matters More Than You Think

Engine oil protects your car’s most important part — the engine. It does four major jobs: lubricates the engine, keeps it cool, cleans out waste, and prevents rust. Without good oil, engine parts grind together. This creates heat, damage, and high repair costs.

As the oil moves through the engine, it picks up dirt, metal particles, and other waste. These materials make the oil dirty and less effective. Even the best oil breaks down over time. It loses thickness, or “viscosity,” and starts to form sludge. Sludge can block passages and starve the engine of lubrication.

At Biswas Automobiles, we always say that oil is your engine’s first line of defense. We don’t just change oil — we inspect it, check for leaks, and give you honest advice. Keeping the oil fresh means your car runs better, lasts longer, and saves you money on repairs.

What Affects How Often You Should Change Your Oil?

How often you need an oil change depends on how and where you drive, what oil you use, and your car’s age. There’s no one answer for everyone, but we break it down simply.

If you drive short distances often, sit in traffic for hours, or drive in hot, dusty roads (like many areas in Dhaka), you need more frequent oil changes. These conditions stress your engine and break down oil faster. If your trips are longer and smoother, the oil lasts longer.

Older cars often burn more oil. They may leak or run hotter. That means they need oil changes more often. Newer cars can go longer between oil changes, especially if they use full synthetic oil.

The oil itself also matters. Conventional oil wears out faster. Semi-synthetic lasts longer, and full synthetic offers the best protection and the longest life. We recommend full synthetic oil for most city drivers in Dhaka, especially in hot weather.

Recommended Oil Change Intervals

At Biswas Automobiles, we tailor oil change schedules based on your car and your daily routine. But here are general guidelines we use:

Even if you don’t drive much, you should still change your oil once a year. Oil degrades with time, not just mileage. This is especially true if your car sits unused for days or weeks.

We always check your oil quality, not just the mileage. Sometimes the oil looks clean but has lost its strength. That’s why we check both condition and level when you bring your car in.

Signs That It’s Time for an Oil Change

If your oil is overdue, your car will start to show signs. One of the first is the oil change light or check engine light on your dashboard. But you shouldn’t wait for that. Many symptoms come before the warning lights.

You may hear your engine getting louder or knocking when it runs. You might smell burnt oil inside the car. Check your oil dipstick — if the oil looks black and thick, it’s time for a change. Smoke from the exhaust and lower fuel mileage are also signs.

When you come to us, we don’t guess. We look at your oil, check for leaks, and test your filter. If the oil still has life left, we’ll tell you. If not, we’ll help you pick the right oil and take care of it for you.

How to Check Your Engine Oil Yourself

You can check your oil at home in five minutes. Here’s how we explain it to our customers:

1. Park your car on flat ground and turn off the engine.
2. Wait about 10 minutes so the oil settles.
3. Pull out the dipstick, wipe it clean, and put it back in.
4. Pull it out again and look at the level and color.
5. If the level is low or the oil looks dirty, visit us.

Clean oil should be amber in color and easy to spread. Dirty oil is dark and thick. If your oil is too low, your engine won’t get the protection it needs.

Some newer cars have no dipstick. Instead, they show oil level on the dashboard. If you’re unsure, we’ll check it for you — free of charge.

What Happens If You Skip Oil Changes?

Skipping oil changes doesn’t just hurt your engine — it can ruin it. We’ve seen many good cars come in with problems that started from delayed oil changes.

Old oil gets dirty and thick. It can’t flow properly. It turns into sludge and blocks oil paths inside the engine. That causes overheating, wear, and serious damage. Eventually, the engine can seize up, which is a very expensive repair.

Also, if you ignore oil changes, your fuel economy drops. Your car burns more fuel, feels sluggish, and may even fail emission tests. The cost of an oil change is small. The cost of an engine replacement is not.

We always tell our customers: It’s cheaper to maintain than to repair. A small service today can save you thousands later.

What About Hybrid or Electric Cars?

Hybrid cars still need oil changes. Even though the engine doesn’t run as much, it still works hard when it does. The start-stop action creates moisture and stress that break down oil faster.

We recommend full synthetic oil for hybrids and a change every 8,000 to 10,000 kilometers or once a year. Don’t skip it just because your engine runs less.

Electric cars don’t use engine oil. But they still need maintenance — coolant checks, brake fluid checks, and more. At Biswas Automobiles, we handle both hybrid and EV services, so you’re in good hands no matter what you drive.

Common Oil Change Questions We Hear

How many kilometers can you go before changing oil?

That depends on the oil. Full synthetic lasts up to 15,000 km. But in Dhaka, we recommend shorter intervals — around 7,000–10,000 km for most drivers.

Is it okay to change oil once a year?

Yes, if you use full synthetic oil and don’t drive often. But if you drive daily or deal with traffic, twice a year is better.

What’s the best oil for my car?

It depends on your car’s engine, age, and usage. We help you choose the right oil grade and brand for your car, whether it's Toyota, Honda, BMW, or another make.

Why Get Your Oil Changed at Biswas Automobiles?

We opened Biswas Automobiles in 2015 because Dhaka drivers needed honest, reliable, and complete car servicing — all in one place. We’re proud to offer expert oil changes using only manufacturer-approved oils and filters.

We service all makes and models, including luxury, hybrid, and electric vehicles. Our garage is equipped with modern tools, German paint booth technology, and experienced staff. We offer pickup, drop-off, and even emergency service if you need help on the road.

Located near Bashundhara, Gulshan and Nodda, we’re easy to reach. You can walk in or call ahead. Either way, we’ll take care of your car like it’s our own.

Book Your Next Oil Change With Us

Your engine needs care. Don’t wait for signs of trouble. Whether you need a conventional oil change, full synthetic service, or hybrid maintenance — we’re ready.

Let us keep your engine clean, cool, and protected — one oil change at a time.

`