What happens if you put 10W40 instead of 10W30?

Between a 10W-30 and 10W-40, 10W30 motor oil would run smoother in colder climates while a 10W40 would be more effective in preventing engine wear and tear in warmer temperatures.
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Can I run 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.
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Is it OK to use 10W40 instead of 10W30 in a motorcycle?

The short answer is yes. Because both oils are formulated to give the same performance, it will be safe for you to use either oil. Some differences between the two oils include viscosity and base oil.
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Is 10W30 the same as 10W40?

The higher this number is, the more protection the oil provides when dealing with extreme heat and pressure. With this in mind, the only difference between 10W30 and 10W40 oil is the viscosity during higher temperatures and more pressure. 10W40 is going to be thicker when the temperatures rise.
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Will 10W40 hurt a 5w30 engine?

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.
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Q: 10W-40 OIL IN 10W-30 ENGINE? SPROCKET UPDATE, TYRE WARRANTY, ROYAL ENFIELD SERVICE, CARB CLEANER



Can you mix 10W30 and 10/40 oil?

Mixing 10W30 with 10W40

Some say that mixing them is fine as long as you don't live in freezing weather. Even if you put together synthetic and conventional blends of these motor oils, they show no harm to your vehicle. However, this is true only if you mix in a quart of the other type to your usual engine oil.
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What happens if I put the wrong oil in my car?

Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.
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Is 10W-40 too thick?

A low viscosity oil will move quicker through the engine to keep it lubricated and cool. Additionally, if your engine has a lower running temperature, 10W-40 motor oil might be too thick. Its higher viscosity at running temperature can reduce engine effectiveness as it'll need more energy to keep the engine operating.
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Which oil is thicker 10w30 or 10W40?

The difference between 10W-30 and a 10W-40 is the high temperature viscosity. Obviously, a 10W-40 is thicker than a 10W-30 at high temperature.
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Is 10w30 better for high-mileage?

10W-30 motor oil makes for a decent high-mileage oil. It gives a better fuel economy while reducing the oil consumption for older engines. Older engines with more than 75,000 miles on them require a thicker oil that will properly lubricate their critical engine parts and prevent oil leaks, sludge, and deposits.
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Can I put 10W40 in my motorcycle?

You may use 10W40 motor oil if your motorcycle's engine has older moving parts. This type of oil is designed for lubricating older parts to make them perform optimally. More importantly, it is ideal for use in motorbikes in winter climates.
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What can I use instead of 10W30?

Which Oil Is Better 5w30 Or 10w30? The 5w30 oil is a great multigrade oil that can be used in low starting temperatures and high summer temperatures. In addition, it is more fuel efficient since it reduces the drag on the bearings and engine parts, which reduces fuel consumption.
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What is 10W 40 oil used for?

This oil weight is commonly used in diesel engines or in a smaller motorcycle engine too. The 10W-40 oil viscosity also often serves as an alternative for older engines with burning or oil leaking issues. Why is that? The 10W-40 engine oil has a thicker viscosity than, say, 10W-30 oil when the car engine is hot.
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Can you use thicker oil in an older engine?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil — 10W — can help protect worn engine bearings as well.
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Is 10w40 fully synthetic?

Semi-synthetic oils such as 10W40 have long been the standard. Their base is refined crude oil, which is then blended with additives. However the market is moving towards synthetic oils.
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Can you mix oil viscosity?

yes you can mix same brand and type oils with different viscosity and it will be fine as long as you don't mix them 50/50. If you mix 200 ml of oil with the rest of oil needed for your engine you will be totally fine.
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Does oil get thicker as it warms up?

Your engine needs oil that is thin enough for cold starts, and thick enough when the engine is hot. Since oil gets thinner when heated, and thicker when cooled, most of us use what are called multi-grade, or multi-viscosity oils.
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Can I mix oil weights?

The truth is simple: don't mix two different oils that have different weights (viscosities). Viscosity Grades might sound pretty scientific, but the simple fact is that this is what keeps your engine running smoothly.
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Will heavier oil hurt my engine?

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.
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What's the thickest motor oil?

Importance of a Viscosity Scale

In order to have a standard way to measure the viscosity of engine oil, the Society of Automotive Engineers (SAE) developed a viscosity scale. The scale ranges from 0W, which is the thinnest type of oil, to a rating of 60, which is the thickest oil.
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What does the W stand for in oil?

The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. The long answer:The Society of Automotive Engineers (SAE) has established a numerical code system for grading motor oils according to their viscosity characteristics.
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Can wrong oil cause misfire?

Can A Dirty Oil Filter Cause Misfire? When an oil filter is bad, it can reduce oil flow, which can cause an improper valve timing, which can result in a misfire. If oil flow is low for a long time, worn engine parts may result in a misfire.
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Can wrong oil cause knocking?

Even with the oil full, if it is not being sent to the places in the engine that need it. Low oil pressure can be caused by a clogged line, a bad pump, or a clogged filter. The low oil pressure would rob the engine of the oil it needs and produce a knocking sound.
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Can wrong oil cause car to smoke?

Using the wrong oil type and viscosity in your car's engine can cause it to smoke excessively. It's due to the oil not burning correctly, causing it to get into the exhaust. This results in your exhaust blowing white smoke.
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