Is it bad that I put 10w40 in my engine that takes 5w30?
Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.
Will using 10W-40 an on engine that is asking for 5W-30 negatively affect my engine if yes in what ways?
With that said, there is very little chance that using 10w40 in your vehicle that specifies 5w30 is going to produce noticeable negative results. If you read your service manual it may even recommend 10w40 for excessively hot climates. You may notice more oil pressure and very slightly less fuel economy.
Is 5W-30 or 10W-40 better?
The smaller the number, the better it will flow. So a 5W-30 will flow easier than a 10W-30 at start-up temperatures and a 10W-30 will flow easier than a 10W-40 at normal engine operating temperatures. This is important, as engine oils naturally thicken as they cool and thin as they are heated.
Can I use 10W-40 instead of 5w40?
10w40 is thicker than 5w40, ONLY when cold. At operating temperature it is exactly the same. Multi-viscosity oils with a lower W number are specifically designed to flow better, and thus lubricate better, at very low temperatures. There is no need to use a 5w-40 if the vehicle only requires 10w-40.
Which is thicker 5W40 or 10w40?
The main difference between the two oil types is that one is thinner than the other. The 5W40 is thinner than the 10W40 at lower temperatures. On the other hand, the 10W40 motor oils are thicker than the 5W40 oils for good reasons. This oil type works pretty well in lubricating engine parts during startup.
Should I use thicker oil in a high-mileage engine?
High-mileage motor oil doesn’t hurt and it could prevent leaks from starting. Some mechanics recommend switching to a thicker (higher viscosity) oil — such as 10W-30 full synthetic oil instead of 5W-20 full synthetic — or using oil additives to stop leaks.
What weight oil is best for high mileage?
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.
Can you use 10W-40 oil instead of 5W-30?
10W-40 will help reducing the high oil consumption because it is thicker at operating temperature. However, is the 5W-30 oil recommended by the manufacturer? If it is the recommended one then you got an issue in your engine that is making it consume oil, most likely piston rings going bad.
Which is thinner 10 W 30 or 40 W 40?
As such lower the number, the thinner the oil: a 30 oil is thinner than a 40 oil at 100°C etc. One must use the oil specified by the manufacturer. If you use 10-w-40 instead of 5-w-30 specified by the manufacturer then the viscosity of 10-w-40 used by you will be higher and oil thicker than what is specified during winters.
Can you run 0w40 oil in cold weather?
People are running this in engines that call for 10W30, 5W30, 10W40, etc. and just buy this quality oil in bulk at a low price. I wouldn’t be worried about the 0W in the spec for cold weather starts but was wondering if a 40W oil is too thick for driving down the road with the engine warmed up. Is this a bad idea?
Which is better 0-40 oil or 0-30 oil?
Your assuming the 0-40 is much better than 0-30 based on test results of others. Perhaps the euro oil stock IS actually better. I would not assume the US stock, sold at Walmart is for sure the same. There is a reason stuff is cheap at Walmart.