It's best to use the oil viscosity recommended in the owner's manual, but using a slightly thinner or thicker oil (lighter or heavier viscosity) generally poses no long-term harm.
Is it OK to use a heavier weight oil?
Using oil that is thicker than recommended may lead to a decrease in fuel economy, a higher load on your engine, and even a shorter life for your engine. Conversely, using thinner, lighter-weight oil than recommended can cause excessive wear and shorter life.
Can too thick oil damage engine?
If the engine oil is too thick, it can lead to higher fuel consumption. A thicker engine oil increases the resistance between moving pistons. This can severely degrade your engine's performance and fuel economy of your car. Higher resistance means your car will burn more fuel to get the engine running.
Will it hurt to put 10w30 in a 5w30 engine?
Synthetic oils will mix perfectly, as long as they have the same chemical composition. As a result, mixing 10w30 and 5w30 is not a problem since one will be topping up. It is not harmful to mix engine oils because 5w30 and 10w30 engine oils have close viscosity, so mixing them is not harmful.
What happens if you put the wrong weight oil in your car?
You might notice a few oil spot in your garage or under your car because using the wrong oil can lead to leaks, or you might become aware of a burning smell while driving. If the oil isn't working as it should engine parts might not be lubricated well enough and cause friction, which can burn the oil.
18 related questions foundCan I put 10w40 instead of 5w30?
Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.
What if I use 0W 20 instead of 5w30?
Can I use a 0W-20 in my car that recommends 5W-30? No, if your owner's manual calls for a thicker oil, you should not use a thinner SAE grade nor use a thicker oil for a recommended thinner oil vis-grade. Using the proper viscosity motor oil will help protect and maintain the performance of your vehicle's engine.
Is Thicker oil better for older engines?
Older engines use more oil, but it gives them a better fuel economy. Older engines with more than 75,000 miles on them require a thicker oil that will lubricate their critical engine parts and prevent oil leaks, sludge, and deposits from forming.
What is the next thicker oil than 5w30?
10w30 is thicker than 5w30 because it has a higher viscosity in low temperatures. The engine oil will flow slower than 5w30 during the cold season. Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil. Thicker oil offers better lubrication of motor and engine parts.
Is it bad to mix old oil with new oil?
It is perfectly acceptable to add new oil to old oil to maintain the correct oil levels between oil change services. It is important to add the oil type recommended by your manufacturer. The addition of oil to the engine does not substitute for changing the oil.
Which oil is thicker 5w30 or 10w30?
So both the oils 5W–30 and 10W–30 have exactly the same viscosity (SAE 30) when your engine is running, and will perform in the same way. However, the 10W–30 oil will be thicker (higher viscosity) than the 5W–30 when it is cool.
Can I use 10w40 instead of 10w30?
The 10w30 and 10w40 oil options are both acceptable for your car, but if you have a high mileage car, you should use the 10w40 oil. Viscous 10w40 is more viscous than viscous 10w30. Older engines are able to handle higher temperatures and wear and tear more efficiently with thicker oil.
What does 10w30 mean?
The 10W30 designation on engine oil means that the viscosity of the oil is rated at 10W when an engine is cold, and 30 when the engine is hot. This is different than an oil labelled 5W30, which has a thinner viscosity when the engine is cold at 5W.
Can I use 5W40 instead of 5w30?
Can You Add 5w40 To 5w30? Miscible oils are those that are not formed by heat. It is not necessary to add one to the other in any significant proportion since they will easily form a solution together. If you mix 1 litre of 5W30 with 5W40, there will be no harm to the engine, as long as it is mixed with 5W40.
Can I use 10W30 instead of 5w20?
Originally Answered: Can I put 10w30 instead of 5w20? You can, but you will get worse mileage, and in most cases shorten the life of your engine, as it will take longer to pump up pressure for your bearings and lifters, and won't spray your lower cylinders for an extra second or so on each cold start.
Does thicker oil protect?
Thicker oils also compromise cold temperature flow, which may be of concern depending upon climate and season. The best protection against wear is probably a product that is a little thicker (such as SAE 10W-30 or 15W-40) and has more antiwear additives than the oils that support the warranty.
Can I use 20w50 instead of 5w30?
Use in Cars
A 5W-30 oil is commonly used in passenger cars for normal use throughout the year. A 20W-50 oil will not protect a car as well in a cold winter and its greater viscosity will increase drag and friction in a passenger vehicle.
Is it better to use 5w30 or 10W30?
5W-30 multi grade oil is ideal for private vehicles and light-duty petrol and diesel engines. It also provides a better cold temperature start than 10W-30 oil. On the other hand, the slightly thicker oil,10W-30, provides better lubrication for commercial vehicles and heavy-load engine cars.
What will happen if I put 5w30 instead of 5w20?
What Will Happen If You Put 5w30 Instead Of 5w20? Using 5W-30 instead of 5W-20, you risk damaging your car's engine because the internal engine components work with 5W-20 motor oil. 5W-20 and 5W-30 motor oil both have the same winter rating. It means that both motor oils have the same viscosity under cold temperature.
When should I use heavier oil?
If, for instance, clearances between engine components have increased, gotten sloppy, a thicker oil can help to fill the void. Within reason, thicker oil maintains a better lubricant film between moving parts. Some have even used thicker oil in a leaky engine to prevent oil from seeping out.
Will 20W50 hurt my engine?
Is 20W-50 Oil Bad For My Engine? 20W-50 is not a very popular oil viscosity. In the wrong engine, it can lead to sludge, excess friction, varnish deposits, problems with oil burning and oil pressure, and even affect your engine life.
Is 10W40 thicker than 10W30?
10W40 oil has a higher viscosity, retaining more thickness than 10W30 as the temperature rises. In that case, 10W-40 motor oil would technically provide better protection against engine wear contact in higher temperatures.
Does 0w20 damage engine?
Answer: Yes, 0W-20 is unquestionably safe for your engine. Manufacturers have been specifying 5W-20 and 0W-20 since the early part of the last decade and there is no evidence whatsoever that engine wear rates have increased.
Why do new cars use 0w20?
0W-20 is a popular oil viscosity grade, especially during colder winters and in low operating temperature conditions. It prevents viscosity breakdown and engine wear and offers better fuel efficiency. With the right engine and environmental conditions, 0W-20 is certainly not bad for your car.
How long does 0w20 synthetic oil last?
How Often Should You Change Synthetic Oil? Standard oil change intervals are typically listed at 5,000 miles or 6 months to ensure peak performance. Toyota models that are required to use 0W-20 synthetic oil extend that interval to 10,000 miles or 12 months.
