Should I Use Thicker Oil in a High Mileage Engine?: Know Now!
If you look at different oils, you will find different thicknesses and viscosity for them. Thicker oil mainly refers to 10w30 synthetic oil, slightly thicker than the regular synthetic oil. But the question is should I use thicker oil in a high mileage engine? Yes, you should.
Before you get more about the answer to your query, you must know what the thicker oil means here. You cannot just use regular oil and expect to run a higher mileage engine.
What is Thicker Oil?
When you buy the engine oil, the shopkeeper must want to know what number of oil you want. You have 10,20,30, and 40 numbers of engine oil. These numbers refer to the thickness of your engine oil. The higher number refers to the higher thickness or viscosity of that engine oil.
If you buy the 5w30 vs. 5w20 synthetic oil, you will get the difference between their thickness. The 5w30 would be much thicker than the 5w20.

Advantages of Using Thicker oil
You will find only three advantages of using thicker oil. They are:
- Thicker oil helps your high mileage engine run smoothly through the higher viscosity. You won’t find this feature using any other engine oil. Therefore, thicker engine oil is the perfect solution for high mileage engines.
- Thicker oil can easily handle the high temperature. It will not become a fluid very soon to allow the engine to consume more engine oil than the regular usage. It has a higher viscosity which allows the engine to consume oil slowly.
- Using thicker engine oil in your high mileage engine will take high pressure and bear the engine loads better than lower viscosity engine oil. It’s magic to use the higher thicker, or high viscosity engine oil for a high mileage engine.
Should You Use Thicker Oil in a High Mileage Engine?
You should use thicker oil in a high mileage engine. In that case, you will find that both the 10w30 vs. 10w40 synthetic engine oil has the best-fitted engine oil. You cannot replace them with anything else until you find something thicker than them. These two are the best thicker engine oils which will allow your engine to run for a very long time.
If you have a choice to use synthetic oil, you must try with 10w40 synthetic oil. It’s a super thicker oil for a higher mileage engine. You should read your engine requirements and recommended oil; it will help you choose the best motor oil. You can use that oil without any concern about damaging your high mileage engine.
Moreover, the thicker engine oil is always a better suit for high mileage engines since it can bear the high load and temperature. It will fail to support your car’s engine, increasing your overall cost. Therefore, thicker oil is the best option for a high mileage engine.

Is Thicker Oil Safe for Car Engines?
Thicker oil is safe for car engines if that comes with a high mileage engine. You cannot use the higher thicker engine oil on a regular mileage engine. It will damage the engine by creating some barriers to running.
Can You Regularly Use Thicker Oil for the Same Engine?
You can regularly use thicker oil for the same engine if it comes with the requirements of thicker engine oil. Otherwise, you cannot use the thicker engine oil regularly. It will help you if you read the engine capacity and manufacturer suggestions.
Will Thicker Oil Damage My Car Engine?
The thicker oil will damage your car engine if you use the wrong viscosity engine oil in the wrong vehicle. Using thicker oil in a low viscosity engine will be a great mistake. So, it’s better to check your engine requirements before you start using thicker oil in your car engine.
Closing Words
Should I use Thicker Oil in a High Mileage Engine? Yes, you should, but it will depend on your engine capacity and criteria. If you have a high mileage engine, you must use the high, thicker engine oil like 10w30 or 10w40 synthetic oil. They will support your car engine better than other low viscosity engine oil.