What Does The W Mean On Oil?

The "w" in motor oil stands for winter. The first number in the oil classification refers to a cold weather viscosity. The lower this number is, the less viscous your oil will be at low temperatures. For example, a 5W- motor oil will flow better at lower temperatures than a 15W- motor oil.

Is 5w30 oil thicker than 10w30?

10w30 is thicker then 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.

What does 5W-30 mean?

multigrade oil 5W-30 means that this is a multigrade oil. This is indicated by the two numbers separated by a "W" 5W - shows thickness/viscosity of the oil on a start-up - when you start the car (W - stands for Winter, this indicates oil performance under colder engine temperatures when the engine has not been running)

What's the difference between 10W 30 and 15W 40?

Because 10W-30 is thinner than 15W-40 oil, its film strength can be weaker and it can be more prone to oxidation. ... High quality 10W-30 oils can perform as well, and better than industry-standard 15W-40 oils.

What does 5W 20 mean?

5: This is the oil's viscosity rating at low or winter temperatures. W: This stands for “winter,” and is part of the “5” rating. 20: This is the oil's viscosity rating at high temperatures. Jul 9, 2018

Is Thicker oil better for high mileage cars?

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. May 23, 2013

What happens if I put 10W30 instead of 5W30?

Your oil is a little thicker when cold. No damage will happen. ... The 5W and 10W defines how the oil will flow at 0 degrees. At operating temperature, there will be a completely insignificant difference between the two.

What happens if I use 5w40 instead of 5w30?

In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to temperatures of 50°C, as opposed to 30°C. May 13, 2020

Can you put 5w30 in a 5W20 engine?

There is no harm in using 5W30 instead of 5W20. Oct 27, 2007

Can you mix synthetic and regular oil?

Yes. There is no danger mixing synthetic and conventional motor oil. However, conventional oil will detract from the superior performance of synthetic oil and reduce its benefits. Jul 15, 2020

What is the best 15W40 oil to use?

For anyone who needs a good diesel motor oil to help boost their engine's performance and fuel efficiency, we recommend the Royal Purple 15W-40 Oil. If you want to save some cash and still invest in one of the best diesel oil's on the market, go for the Shell Rotella T6 Synthetic Diesel Motor Oil 5W-40 CJ-4. Jun 16, 2019

What is 10W-40 oil used for?

The synthetic 10W-40 flows easily and still maintains enough viscosity to protect piston skirts and bearings when it gets hot. The improved temperature stability of synthetics makes them a better choice for race engines and serious high-performance engines.

Can I use 10W-40 instead of 15W40?

A 10W40 oil will be thicker in the cold than 15W40 oil, but they will have the same viscosities at higher temperatures. The winter viscosity number dictates cold-start performance. ... 10W40 oil will perform cold starts better than 15W40 oil. May 5, 2019

Should I use 5w20 or 5W30?

Most often, these types of oils best cover the range of possible temperatures, with a 5W-20 oil more geared toward colder climates and a 5W-30 oil more appropriate for warmer temperature extremes. For the most part, either one should work just fine in a vehicle engine regardless of the prevailing temperatures. Nov 18, 2015

Is 5W-20 full synthetic?

Mobil 1™ 5W-20 is made with a proprietary blend of high performance synthetic base stocks fortified with a precisely balanced additive component system. ... Features and Benefits. Features Advantages and Potential Benefits Advanced full synthetic formula Keeps your engine running like new 4 more rows

What is 5W-20 oil good for?

When used in a vehicle's engine, 5W-20 oil creates less friction due to its thinner viscosity, meaning it causes less drag across engine parts like the crankshaft, valvetrain, and pistons. ... This makes 5W-20 preferable for very cold climates, when having thinner oil that can flow easily on start-up is important. Nov 18, 2015

What is the best oil for high mileage trucks?

OUR QUICKLIST Best Overall. Mobil 1 High Mileage 10W-30 Motor Oil. Best Value. Valvoline High Mileage Synthetic Blend Motor Oil. Honorable Mention. Liqui Moly Premium 5W-40 Synthetic Motor Oil. Honorable Mention. Castrol GTX MAGNATEC 5W-20 Full Synthetic Motor Oil. Honorable Mention. Apr 29, 2019

What type of oil is best for high mileage cars?

Best Motor Oil For High Mileage Engines Valvoline (VV150-6PK) MaxLife 10W-40 Higher Mileage Motor Oil. ... Pennzoil High Mileage Vehicle Oil. ... Mobil 1 45000 5W-30 High Mileage Motor Oil. ... Castrol 06470 GTX 20W-50 High Mileage Motor Oil.

Is 5w30 good for high mileage?

5W-30 motor oil is the top viscosity recommendation by automakers over the past four decades for use in many vehicle types. ... Furthermore, high-mileage 5W-30 motor oil is specially formulated for late model vehicles or newer vehicles with over 75,000 miles/120,000 kilometers. May 28, 2020

Will it hurt to put 10w30 in a 5w20 engine?

The oil will eventually dissipate compared to a 10w30. Conventional oil is known to burn off fairly easy compared to a full synthetic oil under hard driving conditions. I know from experience. There should be no issues at all running a 5w30 or a 10w30 oil in a 5w20 spec'd vehicle. Jan 21, 2015

Will 5w30 hurt a 0w20 engine?

No, not true. A 5W-30 full synthetic will flow fine. If you look at the owner's manual for the same Toyota engines in many other countries, they specify 5W-30 for better engine longevity. The reason why they specify 0W-20 (and new cars are trying to go lower such as 0W-16) is for better gas mileage. Mar 13, 2019

Can I switch from 5w30 to 10w30?

Originally Answered: When should I switch from 5W30 to 10W30? You don't need to change under normal circumstances. However, If your engine is high mileage or otherwise using oil you could use a 10W-30 or 10W-40 oil which might lessen the oil use.

Which oil is thicker 5w30 or 5w40?

Viscosity The working viscosity of 5w30 is basically from 9.3 to 12.5mm2/s whereas the operating viscosity of 5w40 is 12.5 to 16.3mm2/s. That means 5w40 has larger viscosity than 5w30. Feb 1, 2021

What happens if you put the wrong oil in a diesel engine?

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. Aug 16, 2019

Does it matter what 5w30 oil I use?

If your car takes 5w30 oil and you put 5w30 oil in it, it'll be fine. Totally wrong, these days the spec compliance of an oil is often more important than the viscosity. Don't put any 5w30 in, put the correct 5w30 in. Dec 29, 2013

What happens if I mix 5w20 and 5w30?

You can mix a 5W20 with a 5W30 oil with minimal amount of issues provided it the same manufacturer and the same API classification. The question is 'why would you?” If it is because you oil is low and the only thing available is a different grade then it might be fine until you can get it changed.

What happens if you use the wrong oil?

The brand of motor oil matters little, but its viscosity grade (10W-30, for example) is important. ... Using the wrong oil can lead to reduced lubrication and shorter engine life. If the manual says to use synthetic oil, do so.

Is there a big difference between 5w20 and 5w30?

When comparing 5w20 vs. 5w30 motor oil, the 20 indicates that the oil has a lower viscosity and is thinner at higher temperatures. ... So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during operating temperatures.

What are the disadvantages of synthetic oil?

A few disadvantages of synthetic oil to be aware of include: Probably the most glaring downside of synthetic oil is the cost. The price of synthetic oil is around two to four times the price of conventional oil. Synthetics may be more prone to additives precipitation during cold storage conditions.

Is synthetic oil worth the cost?

Synthetic oil is more expensive than conventional oil but offers superior protection for your car's engine. Synthetic oil provides more effective protection for your car, may even prolong the life of your engine and would cost the average driver just $65 more each year. ... May 9, 2018

Is mixing 5w30 with 10w30 bad?

Keep in mind oils do not mix if you have 5w30 and add 10w30 it won't give you a blens both oils will stay seperate so you will have a few quarts 5w30 and a quart 10w30 they never mix. By industry agreement/specification, all brands of oils will work fine together. Different viscosities will work fine.

Can I use 5w30 instead of 15W40?

If the manufacturer's recommendation for your engine allows you to use 5W30 oil, you can use either 5W30 or 15W40. If your engine only calls for 15W40, please only use that grade of oil; big engines are too expensive to risk.

What is 15W40 oil used for?

ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL can be used with complete success in over-the-road diesel trucks, off-highway diesel equipment, farm tractors, and passenger cars and light trucks with diesel, turbo-charged diesel engines, or gasoline engines and is backward compatible with previous API Oil Categories.

Which oil is better Rotella or Delo?

Delo flows somewhat better than Rotella at all lower temperatures because it has a higher viscosity index. 3. Delo base oil should hold up considerably longer than Rotella since it is much more oxidation resistant. Jan 20, 2003

Will thicker oil damage my engine?

If you use too thick of a motor oil for the conditions, your fuel mileage will likely suffer. This is because the thicker oil increases resistance on moving parts such as pistons. While your engine will be protected, it will be at the expense of more frequent trips to the gas station.

Is 10w40 good for high mileage?

The slightly thicker oil film from the heavier base weight oil - 10W - can help protect worn engine bearings as well. As long as you're not hearing knocking or serious mechanical noises from the engine, the heavier oil should buy you many more miles of service from your vehicle. Jun 1, 2013

What happens if I 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.

Is it OK to use 15W40 instead of 10W30?

Yes, although it would flow slower when cold but not enough to make much of a difference as long as outside temperatures are above 50F it will also burn less if the motor is using oil but if the motor is solid and not smoking it's best to stick with the 10W30 oil but a 15W40 would work if it's all you have.

When should I use 10w40 oil?

Using 10w30 oil in cold weather will help reduce excessive oil temperatures and drag as the engine warms up. Using 10w40 oil in the summer will help the oil stick to internal components in high temperatures, avoiding the wear and tear from metal-to-metal contact between moving parts.

What temperature is 15W40 good for?

“Diesel has the widest performance range with 5W40,” says Mark Betner of Citgo. “Its starting temperature range is down to minus 22 F (compared with 15-plus with 15W40) up to 122 degrees F (same as 15W40). Nov 2, 2010

How much thicker is 5w30 than 5w20?

5W-30 Versus 5W-20 This means that both grades exhibit the same viscosity under cold conditions. However, 5W-30 features a slightly higher viscosity at 100 degrees Celsius than does 5W-20. This means that once the engine reaches normal operating temperature, 5W-30 oil will be thicker than 5W-20.

What cars use 5w20 oil?

For model year 2001 and Newer: Ford, Honda, Chrysler and other OEM's specify 5W-20 and 0W-20 motor oil for most all cars and light trucks.

What is 5w30 oil used for?

5w30 is used in light-duty diesel engines, light-duty petrol engines, and automotive gasoline engines. 5w30 engine oil is preferred for engines working in cold climates, as it gives good flow at lower temperatures.

Is 5W20 good for high mileage?

​5w30 or 5w20 for high mileage 5w-20 or 5w-30 oil can work effectively with a high mileage car. The former is more appropriate in cold weather, while the latter is advisable during a warmer temperature. The trick for high mileage cars to use an oil that is desirable and won't be affected by extreme temperatures.

What is the best 5W20 synthetic oil?

Top 3 Best Synthetic 5w20 Motor Oil Pressed For Time – Here's Our Top 3. Castrol 03086 EDGE Extended Performance 5W-20 Advanced Full Synthetic Motor Oil, 5 Quart. Pros. Cons. ... Valvoline SynPower 5W-20 Full Synthetic Motor Oil – 5qt (787023) Pros. Cons. ... Valvoline High Mileage with MaxLife Technology 5W-20 Synthetic Blend Motor Oil – 5qt (782253) Pros. ... Conclusion. Nov 19, 2020

How long does 5W20 synthetic oil last?

one year Mobil 1 Extended Performance synthetic oil is recommended for oil change intervals up to 15,000 miles or one year, whichever occurs first.

Is Synthetic Oil Better?

Synthetic oil is by far better for performance. It protects the engine due to lower levels of friction. Additives help clean the engine of deposits. And, fewer impurities mean it burns cleaner, thickens far more slowly, and has fewer deposits to start.

What is the best oil for older engines?

When you're choosing the best oil for older cars or high mileage engines, there are several criteria you can look at. Pennzoil High Mileage Conventional Motor Oil. ... Castrol GTX Part-Synthetic High Mileage. ... Valvoline MaxLife High Mileage Synthetic Blend. ... Mobil1 High Mileage Engine Oil. ... Amsoil Premium Protection Motor Oil. More items... • Nov 13, 2018

Is synthetic oil good for high mileage engines?

Myth: Full synthetic oil is not good for high mileage cars or older vehicles. The myth is rooted in the idea that synthetic oil is “slipperier”—lower in viscosity, or not as compatible with seals and will therefore leak or leak more in places conventional oil might not. Again, completely untrue.

Is synthetic oil better for high mileage vehicles?

High mileage oil is designed for vehicles with more than 75,000 miles. Such oil features additives that help protect seals. This leads to less leakage and oil burn-off, which can be common in older cars. If your vehicle is high-mileage and high performance, it's suggested that you go with this type of synthetic oil. Mar 19, 2018

What is the best oil for classic cars?

There are a number of good high ZDDP oils out there, and many user groups agree that Brad-Penn oil is the best. This is a high-end, conventional/synthetic racing oil blend with ZDDP.

Will using thicker oil stop burning?

Slightly thicker oil won't hurt that worn engine, and if your battery is good, it'll turn over fast. 2. Add two cans (30 ounces) of Alemite CD 2 for Oil Burning, which replaces one quart of the oil you would normally use during an oil change.

Is high mileage oil worth it Car Talk?

High mileage oils are used when there's an issue with oil consumption. ... Such as leaking seals or leaking rings. If the vehicle doesn't display these issues there's no reason to use a high mileage oil. Jul 4, 2016

What is the best high mileage full synthetic oil?

2) Castrol EDGE High Mileage Full Synthetic Motor Oil. 3) Valvoline Full Synthetic High Mileage Motor Oil. 4) Royal Purple HMX High Mileage Synthetic Motor Oil. 5) Shell Rotella T6 Full Synthetic Diesel Engine Oil. 6) Mag 1 Full Synthetic Motor Oil. 7) Mobil Super Synthetic Motor Oil. More items... • Nov 20, 2020

What happens if I put 10W40 instead of 5W20?

In a 5W20 engine. You could use a 0W20 oil (I use 0W20 oil) in cold weather and it would be Ok by Ford. (they will not say it is good, but they will still honor the warranty..) But 10W40 is way off, and I bet they would be not so happy over any engine problems if they found 10W40 in a failed engine. Nov 16, 2011

Can I mix 5W20 and 10w30?

It should be fine, considering the temps, and that the suggested oil viscosity is usually 5W-30, so two quarts of 5W-20 and three of 10W-30 probably come pretty close to some viscosity around 5W-30. Jan 16, 2010

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