The answer is yes. However, you should know that 10W30 has more density than 5W30. In that case, the two oils would have different cold weather viscosities but the same high-temperature viscosity. DS 30-weights are very thin (9. But 10W oil is thicker or. 10W-30 Engine Oil to find out which one is best for you. Yes. If the deal is really, REALLY good, the I'd also buy all the 10W-40 I could stash/stand having - DS oils are really good in all grades, and. I found no reason, period, to run a 15w40 for bearing protection, bio-diesel, or towing in the 6. Every day, trained Jiffy Lube technicians help thousands of motorists select the right motor oil, and that includes choosing synthetic vs. While they are both multi-grade oils that protect and lubricate the engine, they have varying properties. Mixing motor oils can result in unpredictable viscosity levels and decreased performance. It is much better if the two oils are. 5w-30 and 10w-30 are no different once operating temperature has been reached. You can’t mix the two because they aren’t of the same grade. The first number, the W, will end up falling somewhere between 0 and 5W. Most engine oils will have little trouble mixing with one another, as long as they’re of a similar type. As briefly answered in the intro paragraphs above, the simple answer is YES. Is 10W30 thicker than 10W40? No, 10W30 is lighter than 10W40 and would flow more easily in higher temperatures. What About Mixing Different Brands Of Motor Oil? For example, assume that you are using Quaker State 5W-30 in your engine and for whatever reason, you need to add oil during a long trip and only Valvoline 5W-30 is available. If you use 10W-30 instead of 5W-30 in a vehicle designed for 5W-30, you may notice some differences in performance, particularly in colder temperatures. of oil to 1 gal of gas. Location. AMSOIL 0W-30, 5W-30 and 10W-30 synthetic motor oils are ALL 30 weight oils. You don't want anything less that a 30wt in there. Odds are, the difference will be negligible. Both these two engine oils will act similarly. Yes, you can mix them. 5W – 30 and 10W – 30 lubricants have the same viscosity at the operating temperature of the engine. ROCHESTER, NY. These two oils only have a difference of five points on the scale, so mixing can be done successfully. In most cases, combining two oils with different viscosities won’t harm your engine and is better than running low on oil. Will you like something which won’t be helpful for you at all? Well, that’s what mixing 5w30 with 10w30 seems like. when you mix oils you add the wt. #4. The reason being is that 5w30 and 10w30 oil have different viscosities. 4,373. 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. The downside to 10w30 is it can be had in some low quality lubes, so make sure you go for a quality. The 5w40 is not in the recommended motor oil, but you can still use it if you want to. i do this all the time. Learn more about recycling used oil at. There's been talk before of owners using too heavy of a wt. Which oil is better 5w30 or 10w30? 5w30 is less viscous than 10w30. But the resulting oil should still be at least a 5W. If your motor oil will be in the engine during winter, use 5w30 motor oil. In fact, the viscosity difference between 10W30 and 5W30 is essentially neglectable. In the 10w40 we have 30. However, using thicker oil than recommended will put more stress on the engine resulting in premature wear of engine parts and poor fuel economy. My 2GR's run 30 and 40 grades. Avoid spilling during mixing the oil as it can make a burning scent. 3 to 11. However, it may void your warranty if you tell the dealer about it. Both are the same viscosity at operating temperatures. However, there are some exceptions to this rule. Just like mixing oil brands would change things that could affect. Properly dispose of used oil. Despite their slight differences in viscosity grades, these oils share similarities when it comes to temperature considerations. ROCHESTER, NY. You can mix 0w3o and 5w30 oil, but it is not recommended. As briefly answered in the intro paragraphs above, the simple answer is YES. I'd probably stick to Royal. Thanks to their close viscosity, mixing the two oils will have no damaging effect on the engine. If your mower manual calls for a 5W-30 engine oil, using a 10W-30 oil is also acceptable. Unless you are experiencing some very cold, and I mean VERY cold temps, 10w30 will work fine. This is a mixture of 8 oz. Generally, it is recommended to use a multigrade oil like 5W30 or 10W30, which has the ability to flow easily at cold temperatures, yet which can maintain film strength at. If they originally recommended 5W-30, your mixture will not pump as well at very cold temperatures. Mixing 5w30 and 10w30 will bring zero advantages for you. Yes, you can mix 10W30 with 5W30. When you mix motor oils, you deprive your engine of enjoying the full benefits both oils would have delivered if used separately. 10w40 oil is a thicker oil than 5w30. 1. . Say we add a quart of 5w30 to 2 quarts of straight 30 weight. 0. 5w30 is preferred especially in colder climates. You might be wondering whether you can mix 5W30 and 10W30 oil. Still best to use the oil type weight recommended by the OM. Despite the fact that their densities differ, these two oils are quite similar. The rest either became tarnish, or combusted incompletely& formed carbon deposits on the. Re: Can I mix Mobil1 5W-30 with Mobil1 10W-30? (kaitsu) As an engineer I can say absolutely yes, yes you can. On the other hand, the 0w30 motor oil will break down faster than the 10w30 motor oil. The engine will not work correctly, and if you use the mixture for a long time, the engine will be significantly damaged. I never stated a way I intended the mix to work, but simply that it is 50/50 and here’s the report. It gets really interesting when adding multiweight to straight weight. Remember, this engine in an air-cooled engine many of the parts get localized heating. Yes, you can mix 5w30 and 10w30 oil. 5w30 is a multi-grade oil, on the other hand, sae30 is a monograde oil. . It is okay to mix, though. Mixing ratios of gas to oil vary, but usually range from 30:1 (4-1/4-oz. Furthermore, use only engine oils designed specifically for your car in terms of weight. But it isn’t necessarily ideal as both oils flow at different rates due to their different temperature endurance. 1 post · Joined 2017. Most oils will mix perfectly, provided they have a similar synthetic. But some car owners would say that you should not mix 0w20 oil to 5w20 oil if your vehicle is still under warranty. Recommended for vehicles with over 75,000 miles. So, you may be wondering if you can use 10w30 instead of 5w30 in your vehicle. As a result, combining the two oils in your engine may be okay. 5w30 motor oil, the 20 indicates that the oil has a lower viscosity and is thinner at higher temperatures. Yes, you can mix 5w30 and 10w40. However, since 5w30 and 10w40 have different viscosity and weight, it is advisable to mix them in equal quantities; that is to say, 50% of 5w30 to 50% of 10w40. On the other hand, the 10w30, due to low viscosity, is entirely compatible with the gasoline engine. But there is a difference in the density of both of these oils. Can You Mix 5w20 and 10w30? Mixing these oils won’t cause huge harm to your vehicle but it is considered safer not to mix multi-grade and straight-weight oils. They should mix well since these two oils have somewhat similar viscosities. Weize Platinum AGM Battery BCI Group 47-12v 60ah H5 Size 47 Automotive Battery, 100RC,. However, you need to know the right way to do this. 5W30 oil is thinner than 10W30 oil, so it will flow more easily and be. So if you want to mix 20w50 oil with a 10w30 oil or if you have to, you can mix them both up. So to get 10W-40 Mobil 1 put in 2 quarts of 5W-30 and top off with 15W-50 (blend HTHS about 4. Mixing 5w 30 with 10w 30 is permissible as long as the ratio is appropriate, but it is not recommended by most vehicle manufacturers. Since the viscosity at higher temperatures is 30 for both, it is best to swap 5w30 for 10w30 during the warmer months. August 15, 2012. 0TDI PD non DPF. I would just use the 10w30. A lot of car drivers are saying that the act did nothing bad or harmful to their engines. by. Stick with the 5w-30 as your engine is used to it and it is what the car requires. 10W-30 synthetic oil’s range is between -25°C/-13°F to 30°C/86°F (sometimes -30°C/-22°F to 35°C/95°F) while a 10W-40 is from -30°C/-22°F to 40°C/104°F. Yes, you can. -Use SAE 30 in warmer temperatures of 40° F and higher (5° C and higher) -Use SAE 10W-30 for a varying temperature range of 0 to 100° F (-18 to 38° C), this. Yes, you can safely mix 5W20 and 10W30 engine oil. Therefore, they will flow in the same manner. If you have the 100C cSt viscosity numbers we can calculate it better. This can cause reduced lubrication leading to wear on the engine parts. When you add 10W30 to a 5W20 engine, the 10W30 separates and does not mix well. YES, as stated in the initial paragraphs above, is the straightforward answer. Yes, it is perfectly safe for you to mix 5W-30 and 10W-30 engine oils. Mixing different weights is bad because engines are optimized to run on one or another so mixing 5w20 with 10w40 means half that oil is either too. 5w40 motor oil has a winter viscosity grade of five, for example. Having a GDI engine with timing chain, however, the lack of Dexos1 Gen2 certification for the 10W30 is a deal-breaker. . 5 gt really doesn't change it much as you can check in the shell viscosity mixer as its only changing it by 1/5 anyway. I didn't notice until it was two late (Autozone didn't have the oils stocked correctly), but I just mixed two 5w20s with three 10w30s. So, feel free to consolidate all vehicles to a 5w30 or 10w30. It’s pretty much okay to mix 10w30 with 5w30. Feb 15, 2012. I certainly think it would be pointless. In addition, the different viscosities can cause the oil to sludge, clogging up your. Can You Mix 5W30 And 10W30. Both 15w40 and 5w40 have a viscosity of 40 degrees. Although 5w30 is less dense, their viscosity is similar, and their combination is perfect. 731. The 10w-30 is higher priced than the 10w-40 also. High mileage oil works in a lot of cases where seals are the cause of the oil loss. But when it’s the dead of winter, everything doesn’t remain usual, and the changes can vary. So we wind up with 8. I have a bit of 5w-30 oil left and I was wondering if I can mix 1 liter of 5w-30 to my 4 liters of 0w-20 oil. Therefore, 5W-30 is better suited for hot. I do the same thing and add the oils to OPE or top off my engines if needed between OCI's. To conclude, you can mix 5W20 & 5W30 provided that they’re from the same brand and API. Blends do not work that way. It was just to let others know mixing 0w30, 5w30 and 10w30 is harmless and can be done without concern under. Additionally, you can combine 10w30 oil and 5w20 oil, but it is also not recommended. My oil mix is the same as your friends (5W20, 5W30, 10W30). If your car is not capable of handling the cold thickness of 10W30, then it should not be mixed. Stick to the approved oils. In an 07 I do no think it would be an issue at all to go 2. Mixing SAE 30 and 10w30 is a terrible idea and might have you counting losses. If you use 10w30 regularly in. In a 5w30 engine, you can add 10w40 oil without seeing any major negative impact. Read on for a guide on how you can mix 10w30 and 5w30 oil. 5w30 oil is an excellent option if you drive your vehicle in an area that experiences significant temperature shifts throughout the year. and how it doesn't agree with these motors due to very tight clearances. Get outstanding performance for your four-cycle gasoline engines. The other number is the weight of the oil and can’t be mixed. 7cst), so they are almost a 20-weight. But he has some 10W-30 in his garage, so he uses it to change the oil. So hot weather or cold weather will affect the usage of 0w20 more than the 5w30 motor oil. 5w30 and 10w30 motor oils have a similar viscosity, so mixing them is not harmful. Phoenix, Arizona - USA. 5w30 and 10w30 engine oils have close viscosity, and thus there is no harm in mixing them. Yes anytime with a new small engine or really any engine you will get some silver like that in the oil but after a few changes it will go away. It can also be more prone to oxidation. SP, SN (5W-20, SAE 5W-30, SAE 10W-30, SAE 10W-40, SAE 25W-60*) API: SL, SJ (SAE 25W-60*) ILSAC: GF-6 (SAE 5W-20, SAE 5W-30, SAE 10W-30) Specifications may vary by viscosity grade. The short answer is, yes, you can technically use 10W40 instead of 10W30. The concern often centers around potential engine damage, but when it comes to oils of similar viscosities, there is no need. Take a close look at the viscosity numbers on the product data sheets. C. 3. In fact, the viscosity difference between 10W30 and 5W30 is essentially neglectable. 10W-30: works well at all temperatures, and helps to make cold starts easier. Yes, you can use 10w30 instead of 5w30 in most cases. When I start to accumulate too much oil, I have actually performed a full OCI with 5 qts of this mix. I don't worry if the 10W30 and the 15W40 are the same brand either. W represents winter and not weight. If the engineers spec/use obsolete technology, and refuse to license the spec requirements, then f@^& 'em. Your car manufacturer’s recommendation notwithstanding, mixing 5W20 and 10W30 won’t cause any harm to your engine. It is best to use the same manufacturer and stay consistent with it. Yes, you can consider using 10w30 instead of 5w30 in the summer when temperatures are higher. Mahzurrah! Apr 16, 2023. It flows more easily at low temperatures. Apr 2, 2010. Q. However, because it is thinner it. Yes, you can mix 5W-30 and 10W-30 motor oils without causing significant issues for your engine. I think this subject was revisited here numerous times. Can I mix 5w 30 with gas? It should be fine. A destroyed engine is not worth saving $3, otherwise the $3 you saved will go towards engine repairs. I use it just fine into sub zero territory (into the minus teens) in the dead of winter with no issues. If you want something thicker, you can use conventional 10W-30, which is very shear-stable and should be even thicker than synthetic 5W-30 and synthetic 0W-30 throughout the OCI. J. Older engines can use the SAE30, while the 10W30 is for modern engines.