But it isn’t necessarily ideal as both oils flow at different rates due to their different temperature endurance. As a car driver, you must know that motor oil is used as a lubricant. of gas). If you search online about mixing oils, you will get a lot of people telling you it is okay. Of course, the two oils have different additives as there is a difference between viscosity index ratings. I agree. If you’re wondering whether you can mix 5W30 and 10W30 oil, the answer is yes. The short answer is yes, but there are some things you should be aware of before mixing the two viscosity grades. 10w30 provides sealing action in the engine due to the fact that it is thicker than 5w30 engine oil. Starting the engine with warmed up oil is THE way to do it, and makes mixing totally not needed. Considering the most critical concerns while mixing the two oils, 5w-30 and 10w-30 are safe and compatible to mix together. It is also important to remember that while 5w30 will work in a car that requires 5w20, it may prevent the engine from achieving maximum fuel efficiency. 5w30 oil has a lower viscosity than 10w30, making it slightly thinner. 5W30 is a multi-grade oil with a viscosity ranging from 5 (lower) to 30 (higher). 10W30 is preferred in warmer climates, but you should. These oils share a close viscosity profile, making them compatible for blending. Dec 9, 2009. So a lot of drivers are already doing it. If your motor oil will be in the engine during winter, use 5w30 motor oil. The answer is yes. That means mixing single grade type of oils with their single grad counterparts. As a result, you have the option of mixing the two oils. The EC product is a heavier 30wt than most others, & meets ACEA A3 specs. However, you probably shouldn’t use 10W-30 only for the sole purpose of decreasing your vehicle’s fuel consumption. From Shell. Gather your materials: You will need two containers of motor oil, one 5W30 and one 5W40. Therefore, 5W-30 is better suited for hot. Like engine oil, you can use multiple oils in the same engine if they are of the same synthetic type. Can You Mix 5W30 and 10W30 Oil? No – you shouldn’t mix engine oils with different specifications like this. Plus, both of them have the same viscosity at temperatures. In cold climates, the viscosity of 10w40 is 10. If the 0w30 motor oil and 10w30 motor oil are heated up, these motor oils will have the same viscosity. Synthetic 5W-30 can be used in all temperatures. You can’t mix the two because they aren’t of the same grade. First, mixing motor oil grades can create an oil pressure decrease as the engine revs higher. (Explained) Can I mix 5w30 with 10w30? Well, many drivers often think it is good to pour 5w30 oil with 10w30 oil. Pennzoil® motor oil is formulated with Active Cleansing Technology and is proven to protect engines in SAE 10W-30, 10W-40, 20W-50, 5W-20 and 5W-30 viscosities. Ignition – Since 10w20 oil is thicker and combusts at a higher temperature of -18° to 30° Celsius, it may make ignition harder, especially in lower temperatures. To mix and homogenize 5W30 and 10W30 properly, firstly pour 5W30 oil into the engine and then add 10W30. Both are multi-grade oils; however, 5w30 is thinner and faster-flowing oil, making it better suited for light-duty vehicles, while 10w30 has a thicker, slower-moving composition ideal for heavy-duty engine applications. Thinner oils equate to lesser drag, making them more energy-efficient. On my daughter's oil consuming tercel, I add 1 qt of 20-50 Castrol HM to see if thicker. Most oils will mix perfectly, provided they have a similar synthetic. #5. 3 to 11. So when you compare 5W30 vs 10W30, 5W30 oil has a lower number (5), implying the oil thins fairly in an extremely low temperature, making it a better winter engine oil than 10W-30. Just like mixing full synthetic with semi-synthetic oil – mixing different viscosity such as the 5w30 and 5w40 is not a bad idea, especially if you are running low on oil. Synthetic 5W-30 can be used in all temperatures. First, mixing motor oil grades can create an oil pressure decrease as the engine revs higher. ”. Take a close look at the viscosity numbers on the product data sheets. If your tractor or truck calls for 20W hydraulic oil, it may be. For instance, if you have the SAE 30 engine oil, you can mix it. Mine uses 0w30. The short answer is yes, you can use 10W30 oil instead of 5W30 oil in your lawn mower. It is denoted by a combination of numbers and letters, such as 5w30 and 10w30. You may have come across SAE 30 and 10W30 oils and wondered what the difference is between these two options. Before making a decision, it is important to know the technical specifications of every oil type. Engines on most outdoor power equipment operate well with 5W30 Synthetic oil. 5 + 10. The viscosity grade of 10w30 and SAE 30 is the same at operating temperature, so it is perfectly safe to use 10w30 instead of SAE 30 in your lawn mower. But it’d be best to mix oils from the same brand – the additives won’t be too different, so the oils will have better chances of mixing properly to deliver the best possible results. A higher viscosity oil, such as 10w30, will flow slower at low temperatures compared to a lower viscosity oil like 5w30. 6. If you put together these oils, it will boost up oil pressure when cornering at high revs. Mixing the viscosity of oils will not have any effect on the engine. 7%. It should be avoided at all costs. 3 to get the second number. As far as we can tell, Mazda engines don’t use 10w30 motor oil. Both have the same viscosity at higher temperatures, but 5W30 is slightly thinner than 10W30 at cold temperatures. If you mix 2 quarts of 5W20 and 3 of 10W30, it will come pretty close to the viscosity of 5W30 which can ensure a good performance for your engine. What oil Can you mix with 5W-30? These two motor oils are very similar in viscosity; hence, they might mix perfectly in your engine. It is best to use the same manufacturer and stay consistent with it. Bottom Line. #3. Mixing ratios of gas to oil vary, but usually range from 30:1 (4-1/4-oz. Whether you’re topping your 5W30 engine with 5W20 oil or vice versa, you are definitely not triggering any harm or potential damage to the engine’s core components. Location. For example, you can use 5W30, and 10W30 as SAE 30 motor oil alternatives. Older engines can use the SAE30, while the 10W30 is for modern engines. February 17, 2022. This is a question that has been asked for years. Thin liquids that flow easily, like water, have low viscosity. Yes, you can. Thanks to their close viscosity, mixing the two oils will have no damaging effect on the engine. 5w30 – has a rating of around 11. Whereas 10w30 is a high-grade oil and has a higher density. In fact, the viscosity difference between 10W30 and 5W30 is essentially neglectable. Therefore, we can assure you that combining them is safe and won’t result in any significant engine issues. of gas) to 50:1 (2-1/2-oz. K. So, Can you mix 5w30 and 10w30? Yes, you can mix 5w30 and 10w30 oil. Just like SAE 30, it will begin to break down at about 260℉. It’s pretty much okay to mix 10w30 with 5w30. SAE 30 is a single-grade, while 5W-30 is a multi-grade motor oil. #9. Yes, you can mix 5W20 and 5W30 oils together, but only under specific conditions. Quoting Stephen Miller from Shell: “For instance, if you mix viscosity grades such as a 5W30 low-viscosity oil and a 10W40 higher-viscosity oil, it is reasonable to expect that the resulting product will have viscosity characteristics which are thicker than the 5W30, but thinner than the 10W40. To get a 7. It calls for 5W-30 motor oil. Merely, it’s easy to understand that the lower the. It has a low viscosity of five, and the high viscosity is forty. When it comes to choosing the right motor oil for your vehicle, you may come across different grades and types. It won't harm your engine to mix, for example, Quaker State® motor oil with Pennzoil, as long as the oil you use is the weight (or viscosity) recommended in your vehicle owner's manual. There is minimal viscosity difference between 5w30 and 5w20. But in winter, it becomes difficult to run a snowblower in ice with 10w30. Resources Can I Mix 5w30 and 10w30 Oil? So, mixing 5w30 and 10w30 oil will not cause any harm, so that you can mix the two of them. Therefore, there is no problem in mixing 10w30 and 5w30 since one. So if you’re a little hesitant about the. Yes, mixing 5W30 with 10W30 motor oil can affect your engine. These two oils only have a difference of five points on the scale, so mixing can be done successfully. Castrol, Valvoline, Pennzoil "conventionals" are all labeled "synthetic blend" in 5w-20 and 5w-30. Therefore, they will flow in the same manner. However, 10w-30 oils tend to have significantly lower volatility than 5w-30 oils. In most cases, combining two oils with different viscosities won’t harm your engine and is better than running low on oil. Yes, you can mix 5w20 and 5w30 engine oils. I do the same thing and add the oils to OPE or top off my engines if needed between OCI's. 10w30 and 5w30 have different viscosity ratings. The 5w20 oil is significantly thinner than the 10w30 oil. For example, do not mix 10w-30 motor oil with 5w-30 motor oil. AutoZone will tell you 5w30 but if you look on all the Mercedes forums they will tell you 0w30. As a result, many consumers can. You can mix 5w30 and 10w30 oil together. Use the oil that is called for, every time. So (30+30+25)/3 = 28. Castrol GTX MAGNATEC Motor Oil 5W30 Full Synthetic 5 L. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. They are both multi-grade oils and are compatible with each other. But the rule of thumb is to refer to your owner’s manual. Can I Mix 10w30 and 5w30? Most oils will mix perfectly, provided they have a similar synthetic. The 10W is the viscosity of oil under 0°C (32°F), and 30 (SAE 30) is the oil viscosity at 100°C (212°F). Viscosity is the level of a liquid’s resistance to flow. As such, mixing synthetic and conventional oil is okay sometimes if you don’t do it frequently, but otherwise, frequently mixing together can affect their performance. New Jersey. Sometimes thicker oil is even recommended in higher mileage engines, although I believe the jury is still out on it. 5W-25 for a car you actually care about, I wouldn't. Nick778, Make things easy on yourself and run some Mobil 1, 0w-40, or perhaps the Redline or Amsoil 10w-40 synthetics. The most obvious difference between 5w30 and 10w30 oil is their viscosity. #4 · Apr 8, 2013 (Edited) I would not mix 2. Running 10W30 in addition to 5W30 will not harm your engine. That may be true with Mobil's offerings, but Castrol, and Pennzoil 10w vs 5w can be many CST's different. 10w30 oil is thicker and heavier than 5w30 oil because it has a higher viscosity at low temperatures. So in using 0w30 motor oil in replacement to the 10w30. They will mix perfectly. Unless you are experiencing some very cold, and I mean VERY cold temps, 10w30 will work fine. If your running it day in and day out, I would use a HDEO 15w40, or 15w50. What You Should Know About Oil Thickness At Different Temperatures. In the case of 10W30 oils, the temperature range is -25°C/-13°F to 30°C/86°F. The 10w30. One year, I had some 0W30, and I used that. However, if you do use 10w30 in a 5w20 engine, it may lead to several negative effects on your car –. In that case, the two oils would have different cold weather viscosities but the same high-temperature viscosity. of oil to one gal. For comparison’s sake, SAE 5W-30 and SAE 0W-30 will flow better at colder temperatures than SAE 10W-30, while still providing protection at higher temperatures. Yes, you can mix 10w30 and 5w30 engine oil. Can You Mix 10W30 And 10W40 Motor Oil? You should avoid mixing 10W30 and 10W40 motor oil whenever possible. At best, if you mix say a 10W40 and a 0W20, you will get a 10W30 at 50/50 ratio. That said, you can mix 10w30 and 5w-30, but it’s. If your running it day in and day out, I would use a HDEO 15w40, or 15w50. The 5W-30's are in the 10's. However, mixing different types of motor oils is generally not recommended because each oil type has been specifically formulated to provide certain characteristics such as viscosity, detergency, and heat dissipation. Originally posted by Ken2: Mobil 1 0W-30, 5W-30, and 10W-30 are basically one formulation, and 0W-40 & 15W-50 are somewhat different formulations. It is possible to combine 5W-30 and 10W-30 engine oil, but it isn’t necessarily the best option. I recently noticed that it calls for 5W-20 engine oil. The short answer is yes, you can use 10w30 instead of 5w30, but there are some things you need to keep in mind. However, we do not recommend doing it because every engine requires different oil viscosity to function efficiently at temperatures. was the standard, I call it a 5w-30 engine so we can compare what the manufacturer called for when new (and back when oil was not what it is now) to what. However, you need to know the right way to do this. The choice between 5W-30 and 10W-30 depends on the specific needs of your engine and the driving conditions you encounter. With so many different types of engine oils on the market, you might be wondering if it’s possible to mix two different viscosities, such as 10w30 and 5w30. In the 10w40 we have 30. It is a thinner oil when operating at lower temperatures. and how it doesn't agree with these motors due to very tight clearances. #4. But there is a difference in the density of both of these oils. However, it is crucial to check your vehicle’s owner’s manual to. However, because it is thinner it. For example, if you are using 10w-30 motor oil, you can mix different brands of 10w-30 motor oil together. In addition, Shell Lubricants has introduced Shell Rotella ® T6 10W-30 full synthetic heavy duty engine oil, which provides the benefits of a full synthetic engine oil in the. If the oil will be in the engine during winter and you live in a place where. Say we add a quart of 5w30 to 2 quarts of straight 30 weight. Mostly 10w30 and 10w40 but the Rislone is more like a 20 weight. I do use add oil to aim the grade to where I want to try.