Importance of oil changes in collector cars

I'll be blunt: if you don't take care of your classic car's oil, you're slowly killing it. So, no beating around the bush. With my experience of having been through a lot, I'll tell you the Importance of oil changes in collector cars.

Look, I understand. It's not a daily-drive car, you don't take it out every day, and maybe you get the impression that the oil is still "fine" because you only drive a few miles a year. But that's where the mistake lies.. A classic engine doesn't need miles to age, it needs time.

And if you think changing the oil only when it "seems necessary" is enough, my friend... you're playing with fire. Let me explain why oil is the lifeblood of your machine and how to ensure it always flows in the best possible condition.

1. The oil in a classic car does not behave like in a modern car

The first thing you need to understand is that older engines were designed to use oils from another era, with different formulations and without the modern additives that protect today's engines.

Also, unlike a new car, a classic engine has more internal clearances, different materials, and mechanics that depend more on oil flow to stay in perfect condition. If the oil deteriorates, there are no sensors to warn you.. You just start it up one day and it sounds like you're grinding stones.

And believe me, you don't want to hear that.

2. Oil degrades over time, not just with use

This is where many collectors go wrong. "My car only traveled 500 km this year, the oil is still good."

Well, no, my friend. Oil not only degrades with the miles traveled, it also oxidizes and loses properties over time.

Think of it this way: a car that's used every day keeps its oil circulating at optimal temperature, burning off impurities. But a car that sits for months has oil that stagnates, accumulates moisture, and begins to lose viscosity.

In other words: a car that is rarely used needs even more frequent oil changes than one that is used daily.

3. How often should you change the oil in your classic?

Here's the golden rule:

At least once a year, even if you haven't traveled even 1,000 km.
If you use it frequently, every 3,000 to 5,000 km.
If the car has been stopped for a long time, change the oil before starting it..

And be careful, it's not just about changing the oil. The filter must also be replaced, because that's where impurities get trapped and could recirculate through the engine.

4. Which oil is best for your classic car?

If you've made it this far, you're probably wondering what type of oil you should use. The answer depends on the car you have, but here are some general recommendations:

Mineral oils – These are the most similar to those used during the car's manufacturing era. Recommended for engines from before the 1980s.
Semi-synthetic oils – They offer better protection and thermal stability, but without being too aggressive with older engines.
Synthetic oils – Only recommended if the engine has been restored and adapted to them.

Also, make sure you choose the correct viscosity. Many classic cars run better with thicker oils (like 20W-50) because their engines were designed to run on less refined oils.

If you have any doubts, check the car's original owner's manual or consult with other collectors. Choosing the right oil is just as important as changing it regularly.

5. How to change the oil correctly?

If you're like me, you probably enjoy tinkering with your car and doing its maintenance yourself. And changing the oil in a classic is one of those rituals that connects you with your machine.

Here are some key tips to get it right:

1️⃣ Warm up the engine before draining the oil – Not too much, just enough to allow the oil to flow better and carry away more impurities.
2️⃣ Use a large tray to collect the used oil. – Some classic cars have large-capacity crankcases.
3️⃣ Change the oil filter every time you change the oil. – Don’t be stingy with this.
4️⃣ Pour in the new oil slowly and check the level. – Don’t just rely on the manual, check with the dipstick.
5️⃣ Start the engine and let it run for a few minutes. – Then check the level again and adjust if necessary.

Oh, and don't just dump old oil anywhere. Take it to a recycling center or a garage that accepts it. Caring for the environment is also part of being a good collector.

6. What happens if you ignore the oil change?

If after all this you still think you can put off changing your oil, let me tell you what can happen:

Accumulation of sludge and debris in the engine – Your car will literally be running on a thick soup of dirt.
Loss of lubrication and increased friction – Premature wear of parts, higher temperatures and possible damage to bearings.
Formation of varnish and deposits in the oil passages – This can obstruct the flow and cause some engine parts to run dry.
Damage to seals and gaskets – Old oil can become acidic and deteriorate the rubber parts of the engine.

And worst of all…

If the engine fails due to lack of lubrication, the repair can cost a fortune.

So, my friend, it's better to spend a few dollars on new oil than to end up spending thousands on an engine rebuild. Believe me, there's no worse feeling than hearing a classic engine knock from lack of lubrication. It's like watching an old friend suffer from something you could have prevented.

+Read more: Best products for caring for a classic car's paint

Keep your classic heart beating

At the end of the day, changing the oil in your classic car isn't just a maintenance task. It's an act of love for the machine, its history, and everything it represents.

A well-lubricated engine is an engine that purrs smoothly, responds strongly, and will continue to run for many years to come. So, don't let laziness or lack of information become the enemy of your jewel on wheels. Give it the care it deserves, and it will continue roaring like new.

Now tell me, when was the last time you changed the oil in your classic car? If you have any questions about what type of oil to use or how often to do it, leave them in the comments. Here, among car lovers, we help each other..