Yes, you can add oil when the engine is hot. When it comes to adding oil and other fluids, there is no hard and fast rule of how often you should do so. In most cases, a vehicle factory will recommend an interval according to the type of car and its mileage. For instance, many Toyota cars advise an interval of 10-15 thousand miles or 12 months, whichever is sooner. But, this is an extremely broad range and there’s nothing you can do about it.

Silky Terrier Dog Breed Playing Aro... Silky Terrier Dog Breed Playing Around

Ideal Temperature to Add Oil

You can add oil to the engine when it’s cold, cool or hot. There’s no extreme difference. But you must make sure it’s not extremely hot. There are many reasons why adding oil in extremely hot conditions may not be wise.
For example, in extremely hot conditions, the lubricants inside the engine might vaporize. This will lead to a decrease in their ability to lubricate the engine. The more viscous the oil is and the more temperature the oil is exposed to, the higher its volatility. And that’s what makes it turn into vapor.

How to check engine oil when the engine is hot

Always check the engine oil when the car is on a level surface and all systems are shut off. Be careful given the fact that the engine is hot and it can be dangerous. So, be careful.

How much oil should you add to an engine?

There’s no specific amount of oil you should add to your car. In most cases, it is suggested that you add one ounce of oil per two thousand miles or a quarter quart per thousand miles. But this is only a suggestion and not a hard and fast rule. As mentioned, there’s no exact answer to the question: how much should I add when the engine is hot?

How long do you have to wait between oil changes?

Do not wait more than 2 weeks after changing your car’s oil before checking its condition again. At this time, the car is not a hot engine and you can safely add the oil again.