5w30 vs 10w30 Engine Oil : Which One Is Better?
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- Опубликовано: 10 фев 2025
- 5W30 vs 10W30. Learn the key differences between 5W30 and 10W30 engine oil in this comprehensive video from Honest Mechanic. I'll explain what the numbers and letters mean, and help you understand which oil is best suited for your vehicle based on factors like climate, driving conditions, and engine age.
When comparing 5W30 vs 10W30 oil, it's essential to know that the "W" stands for winter, and the number before it indicates the oil's viscosity at low temperatures. A lower number, like in 5W30, means the oil is thinner and flows more easily when cold compared to 10W30. The "30" after the dash represents the oil's viscosity at high operating temperatures, which is similar for both 5W30 and 10W30 oils.
I'll guide you through the factors to consider when deciding between 10W30 vs 5W30 engine oil, such as extreme cold or hot climates, towing heavy loads, and driving in hilly areas. You'll also learn about the importance of consulting your owner's manual and sticking to the manufacturer's recommended oil viscosity for optimal engine protection and performance.
Discover the difference between 5W30 and 10W30 oils when it comes to high-mileage engines, and how a slightly thicker oil like 10W30 can help maintain proper oil pressure and reduce leaks in older engines with increased clearances due to wear.
I'll also address the common question, "Can you mix 5W30 and 10W30 oils?" While mixing these oils won't cause immediate damage, I'll explain why it's best to avoid mixing different viscosities and stick with the recommended oil type for your engine.
Throughout the video, I emphasize the importance of using high-quality engine oil from reputable brands that meet API and SAE standards to ensure your engine receives the best protection possible.
By the end of this video, you'll have a clear understanding of the differences between 5W30 and 10W30 engine oils, and be able to confidently answer the question, "Is it better to use 5W30 or 10W30?" based on your specific vehicle and driving conditions.
Don't forget to like this video and subscribe to the Honest Mechanic channel for more informative content on vehicle maintenance and repair. I'm here to help you keep your car running smoothly and safely for years to come.
Disclaimer: This content is for educational purposes and should not replace professional advice. As an experienced mechanic, I aim to provide helpful insights, but I'm not liable for any damage or issues arising from the application of this information. Always consult a qualified mechanic for specific vehicle needs. Viewer discretion and responsibility are advised.
That depends mostly on the specs of the oil. However, assuming it has the right specs for your engine, 5-30 is a good allround viscosity. Personally i use GM 5-30 in winter and 5-40 in hot weather.
100%, Great point!
10w 30 is better for hot weather and more aggressive driving. Not 5w 40 that’s European oil.
My 2000 honda accord f23a2 uses 5 w 30
I've stayed with this since owning it. I live in Midwest. It struggled two weeks ago slightly when it's was minus 30 wind chill for 2 days and I started it every two days. And left it idle for five min before driving.
My Nissan Note 1.4 petrol has been fine for years on factory 5w30 but this summer (now over 100,000 miles) I noticed a warning rumble when cold starting. What I did was add Wynns thick oil additive and that has fixed the problem. Should I change to 10w40 at next oilchange?
The narrower the range or "reach" of a multi-viscosity oil, the better that oil will lubricate. For example, a 5W-30 oil has slightly
more long chain polymers in the formula, and proportionally less base oil than a 10W-30. Those polymers,
and the additive package in the oil (detergents, dispersants, etc.), break down. A 10W-50
oil (yes, there is such a thing) is not recommended for any vehicle.
Whichever oil you choose, be sure it is temperature-rated for the climate you are driving
in. The gold standard for oils are the tests they are put through in a laboratory, using, among other things, a Saybolt viscometer. How well does an oil flow, at a given temperature? How well does it lubricate? How robust is the additive package?
Also, what base stock is used in a given oil? It matters. You can contact an oil engineer
at any reputable refiner, and explore the issue in depth. (Ashland Oil, maker of Valvoline, Quaker State, Castrol, Exxon, Pennzoil, and others).
Note: Don't be fooled by the word "synthetic", to describe oil. Its not a man made product.
Its oil which has been put through an extra refining process, which changes the shape of the molecules. Extended oil change intervals are a false promise. No matter what oil you use, the oil and its additive package break down over time, and to protect your engine,
a regular oil and filter change (no more than 5000 miles) must be performed, for long
engine life.
Can I use 5w30 in my 125cc bike? The company recommended is 10w30 (currently using it) but I live in kpk, Pakistan where the temperature drops till 0 Celsius. What do you suggest? Any harms to my engine?
Which one is thicker between 0w40 VS 5w30 ?
If my manufacturer recommends 10w30, is it ok if i change it to 5w30 ?
Is the wear not the same if the visocity is still the same once warmed up ? W30 ?
I live in a hot state under slightly hills. The owners manual recommends 5w-30 And it even says it on the actual dipstick. And that's the kind I always use. I accidentally bought one quart of 10w-30 and 3 quarts of 5w-30. I dumped all of it into the engine, not knowing one of them was the wrong kind until after when I disposed of the empty bottles. And I do live in a hot state and my car does hesitate going up hills or heavy acceleration. But after putting one quart of 10w-30. A car actually did better than before. It ran like a new car. I didn't know that. was panicking when I accidentally put one quart of the wrong oil. My car also leaks oil so I'm kind of panicked even more when I accidentally did this. My car has 250,000 miles so hopefully I didn't do any major damage
Hi Bryan.. You likely didn’t cause any damage by mixing 10w-30 with 5w-30, especially in a hot climate. The slightly thicker oil (10w-30) can provide better protection at higher temperatures, which might explain why your car ran better. Given that your engine has 250,000 miles and leaks oil, the thicker oil may have also reduced oil loss.
10W-30 is not the "wrong" oil. Relax. Mixing one quart of 10W-30 with three quarts of 5W-30, will not harm your engine. In fact, a high mileage engine
may benefit from switching to a 10W-30 oil, as long as your climate is not
bitter cold (below minus 10 degrees F) in the winter. 5W-30 is commonly
recommended by most engine makers, because it slightly increases
corporate average fuel economy -- standards the Federal government imposes on automakers.
With that many miles and heat… I’d use the thicker 10w30 would be better.
Super low height for less friction for better fuel economy but bad for wear.
Great point!