Quick Answer: What Is The Best High Mileage Synthetic Motor Oil?

How many miles can you go on full synthetic motor oil?

It used to be normal to change the oil every 3,000 miles, but with modern lubricants most engines today have recommended oil change intervals of 5,000 to 7,500 miles.

Moreover, if your car’s engine requires full-synthetic motor oil, it might go as far as 15,000 miles between services!.

What is the best full synthetic oil?

6 of the Best Synthetic Oils for Protecting Your Car’s EngineMobil 1’s 0W-40 Synthetic. Mobil 1 amazon.com. Shop Now. … Pennzoil Ultra Platinum 0W-40. Pennzoil amazon.com. … Motorcraft Synthetic Blend 5W-30. Ford amazon.com. … Motorcraft Full Synthetic 5W-50. Ford amazon.com. … Castrol Edge Professional OE Full Synthetic 0W-20. Castrol amazon.com. … Castrol Edge Supercar 5W-50. Castrol amazon.com.

What are the pros and cons of synthetic oil?

Advantages and Disadvantages of Synthetic OilAdvantagesDisadvantagesResistant to oxidation and chemical degradationMore expensiveWithstands temperature extremes better (cold and hot)Possible additive precipitation/separationFlows better at cold temperaturesSlightly lower fuel economy at highway speed3 more rows

Can you put 10w40 in a 5w30 engine?

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.

Is synthetic oil good for high mileage?

High mileage oil is designed for vehicles with more than 75,000 miles. … This leads to less leakage and oil burn-off, which can be common in older cars. If your vehicle is high-mileage and high performance, it’s suggested that you go with this type of synthetic oil. Not every car requires synthetic or high mileage oil.

Which oil is thicker 5w30 or 10w40?

A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine’s moving parts more than the lower viscosity 5w-30 oil.

What’s the difference between high mileage oil and synthetic?

High Mileage Oil: Vehicles are lasting longer, and more than 2/3 of the cars on the road have more than 75,000 miles on them. … Synthetic Blend: Like the name suggests, synthetic blend oils split the difference between conventional and synthetic, both in protection and price point.

Can you mix synthetic and regular oil?

Yes, you can safely mix synthetic and conventional oil. All motor oil, whether synthetic or conventional, is a combination of base oils and additives. … In the end, conventional and synthetic oils are completely compatible.

When should I use high mileage synthetic oil?

The first is to switch when your vehicle reaches 75,000 miles. The second is to switch if your older vehicle is beginning to show signs of engine loosening. If you notice an oil drip, that’s a sign you should start using high-mileage engine oil.

What is the best high mileage full synthetic oil?

1 Pennzoil 550045205-3PK 10W-30. … 2 Valvoline MaxLife 5W-30 Synthetic Blend Motor Oil. … 3 Mobil 1 5W-20 High Mileage Advanced Motor Oil. … 4 Castrol 03129C EDGE 10W-30 Advanced Full Synthetic Motor Oil. … 5 AmazonBasics High Mileage Motor Oil – Full Synthetic 5W-30 – 5 Quart – AMDH533Q.

Is it OK to mix 5w30 with 10w30?

Mixing different oils will not improve the performance or efficiency of the engine in any way. The additives in synthetic oil may have limited or no effect at all when mixed with a regular engine oil. … 5w30 and 10w30 are both 30 weight oils and the exact same thickness in your engine when it is at operating temperature.

Is full synthetic worth it?

Synthetic oil is more expensive than conventional oil but offers superior protection for your car’s engine. So if you can afford the extra cost, you should choose synthetic oil — and if your car requires it, you must use it. …

Can you use regular oil after synthetic?

Switching between synthetic and conventional oils will not cause any damage to an engine. In fact, synthetic blends are a mixture of synthetic and conventional oil. Click here for more information on Cenex engine oils. Find the Cenex oil that’s right for your vehicle with our lubricants recommendation tool.

What oil should I use in my high mileage engine?

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 are the disadvantages of synthetic oil?

Disadvantages of Synthetic Motor OilMany of the synthetic oil blends reduce friction better than conventional motor oil. … Synthetic oil does not hold lead in the suspension of the oil. … Problems with racecar type engines using roller lifters. … Synthetic oil has different disposal methods.More items…•

Is it OK to use full synthetic oil in older cars?

The synthetic oil could leak out and the vehicle could burn or lose oil. … Because synthetic oil does a better job of cleaning out sludge, it could remove deposits that are acting as seals. It’s not accurate to say that you should never use a synthetic oil in an older car.

What happens if I put 10w40 instead of 5w30?

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. Similarly the oil viscosity will be higher and oil thicker than specified during summers.

Can I mix 5w30 with 10w40?

As posted above, mixing 5w30 with 10w40 will give you an oil that performs somewhat better in the cold than 10w40, but less good cold than 5w30, and that has a viscosity a bit higher than 5w30 but a bit lower than 10w40. … Your oil is a little thicker when cold. No damage will happen.