When to Use 10w30 vs 5w30 The only difference between these two oils is cold flow ability: a 10w30 oil will move slower than a 5w30 oil during cold startups. At operating temperatures, both oils will have the same viscosity (30) and will flow and protect identically..
Also question is, can I use 10w30 instead of 5w30?
The 10W30 and 5W30 both have different thicknesses in cold temperatures, and 10W30 is thicker than 5w30. So, it is best for vehicles running in cold climates to use the 5W30 since it is thinner than the 10w30.
Also, is 5w30 thicker than 10w30? 5w30 is used for light-duty engines while 10w30 is used for engines which carry heavier loads. 10w30 provides sealing action in the engine due to the fact that it is thicker than 5w30 engine oil. Thinner at lower temperatures. Thicker at lower temperatures.
One may also ask, which oil is better 10w30 or 5w30?
A higher viscosity oil, such as 10w30, will flow slower at low temperatures compared to a lower viscosity oil like 5w30. A higher viscosity or thicker oil will seal better than a low viscosity oil. A thicker oil will also provide better lubrication of critical engine parts.
What is 10w 30 oil recommended for?
For 10W-30 oil, the 30 is the same as the SAE 30 viscosity rating for warm oil, but the 10W is the viscosity rating for cold oil, according to a standardized rating system developed by the SAE for winter oil use. And that's what the "W" stands for: "winter."
Related Question Answers
Will thicker oil damage my engine?
Not only that, but the engine will waste energy pumping the thicker motor oil, reducing fuel economy. Since thicker oils don't transfer heat as well as thinner oils, operating temperatures will increase, too, possibly leading to accelerated chemical break down and harmful sludge and deposits.Should you put 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. The engine does not leak and I've never seen a whiff of blue smoke.Is it OK to switch from 5w30 to 10w30?
When to Use 10w30 vs 5w30 The only difference between these two oils is cold flow ability: a 10w30 oil will move slower than a 5w30 oil during cold startups. You should always use the weight of oil recommended by your vehicle's manufacturer to provide your engine with the best protection and maximum fuel economy.What happens if you use the wrong oil?
Motor oil slip-ups. The brand of motor oil matters little, but its viscosity grade (10W-30, for example) is important. Use only what the owner's manual specifies. Using the wrong oil can lead to reduced lubrication and shorter engine life. If the manual says to use synthetic oil, do so.What happens if you put 10w30 in a 5w30 engine?
5W30 motor oil means that the oil has a thinner consistency in cold weather and will protect your engine at lower temperatures. Also, 10W30 means the oil will be a little thicker at same lower temperatures, and will then protect the engine the same as 5W30 at higher temperatures. 'W' means, useful for winter usage.What happens if you use 10w40 instead of 5w30?
I would not recommend going to a 10w-40 unless the engine had an oil consumption problem or was used exclusively in a high load application in hot ambient temperatures. 5W30 means that the oil has a thinner consistency in cold weather and will protect your engine at lower temperatures, at less thickness than 10W30.Is it safe to mix 5w30 with 10w30?
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 synthetic oil be mixed with regular oil?
The simple answer: 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. So, yes, you can safely mix synthetic and conventional oil.Can you mix 5w30 and 5/20 oil?
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.Will switching to synthetic oil cause leaks?
Switching to synthetic oil causes leaks: Generally, switching to synthetic oil does not cause leaks. It is true that synthetic oil is thinner than conventional oil and therefore flows more easily. If there is a spot where oil could leak out in your engine, then synthetic oil is more likely to leak than conventional.Does GM recommend synthetic oil?
Dexos engine oil specification is designed by GM Powertrain engineers and is intended specifically for GM engines. Synthetic oils are recommended by lube technicians in high mileage vehicles and vehicles that run in extreme conditions (i.e., cold weather, hot weather, elevation changes).What does the W stand for in 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 synthetic oil better for your engine?
Because synthetic oil is better on your engine and has fewer impurities, it can go longer than conventional oils or synthetic blends. Turbo engines and older cars may still require oil changes every 3,000 to 5,000 miles. Synthetic oil change intervals range 10,000-15,000 miles or once a year (whatever comes first).Should I switch to synthetic oil high mileage?
It's not accurate to say that you should never use synthetic oil in an older car. In fact, Castrol EDGE High Mileage is a synthetic oil designed specifically for high-mileage cars. If the car has been maintained and is in excellent running condition, the synthetic oil may protect the vehicle and prolong its life.Does engine oil get thicker when hot?
If it flows slowly, it gets a high rating. 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.What is the best oil to put in your truck?
Our pick for the best motor oil is Mobil 1 High Mileage 5W-30 Motor Oil - 5 Quart. It's one of the best synthetic oils for high-mileage vehicles, reduces leaks, and minimizes sludge buildup. For a less expensive option, consider the Valvoline High Mileage Synthetic Blend Motor Oil.When should I use 5w30 oil?
At operating temperatures, both oils will have the same viscosity (30) and will flow and protect identically. If the oil will be in the engine during winter and you live in a place where it gets cold during these months, use 5w30 oil. If it will only be in the engine during the summer, use 10w30.Does thicker oil help with leaks?
As an engine heats up, the oil thins, becoming more susceptible to leaks through faulty gaskets. Draining the oil from your vehicle and replacing it with a thicker weight or synthetic oil can help to prevent oil from leaking through some of the smaller breaks in the gasket seals.Will thicker oil reduce oil consumption?
A lot of oil-burning takes place because an engine's piston rings are worn out, and thicker oil won't fix that. They also count on low-viscosity oils to reduce friction and drag (the work of simply moving the engine parts through thicker oil), which improves mileage. 
