Question: Which Oil Is Best For High Mileage Cars?

Is 5w20 or 5w30 better?

The key difference between 5W20 and 5W30 motor oil is that the former is thicker or less viscous.

The more viscous motor oil is, the better it will be able to resist the heat and not break down.

In this case, 5w30 oil will provide better overall engine protection than 5w20..

What is the best oil to use in a high mileage car?

Valvoline High Mileage oilOur Top Pick. The Valvoline High Mileage oil is the most excellent product in the market, and we recognize that by making it our top choice oil. This is an exceptional oil blend made for cars with up to 75,000 miles. It invigorates your engine and allows it to perform better than before.

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.

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

Myth: Full synthetic oil is not good for high mileage cars or older vehicles. … Synthetic oils will enhance the engine protection in older vehicles with higher mileage, just as they do for new engines.

Is 5w30 good for old cars?

In general thinner oils flow faster and lubricate better, and keep the engine parts cooler. using a thicker oil is asking for trouble. So if your original specification calls for 5W30, I wouldn’t change it. … Your driving habit also affect engine performance.

Can I replace 5w30 with 10w40?

When you change the viscosity of your oil, you will be gaining an advantage for some engine parts to the detriment of some other parts. 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.

Is Full Synthetic better than high mileage?

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 oils are popular for trucks and SUVs, especially when drivers subject them to towing or hauling heavy loads.

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.

Can I go from 5w30 to 10w40?

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.

Is 5w30 good for high mileage?

1. Valvoline 5w30 – Editor’s Choice Best Synthetic Blend High Mileage Oil. … Having a large market share also allows Valvoline to cater to all niches, but we think that this is the best all-around motor oil for a high mileage engine that we saw. That is why the Valvoline 5w30 is our Editor’s Choice best high mileage oil.

Can I mix synthetic and regular oil?

Yes, you can safely mix synthetic and conventional oil. … In the end, conventional and synthetic oils are completely compatible. However while you can safely mix synthetic and conventional oils, you’re diluting the performance of the synthetic oil.

Which is better 5w 20 or 5w 30?

The main difference between 5W-30 and 5W-20 motor oil is that the latter gives a slight bump in fuel efficiency. When used in a vehicle’s engine, 5W-20 oil creates less friction due to its thinner viscosity (or thickness), meaning it drags less across engine parts like the crankshaft, valvetrain, and pistons.

Is synthetic oil good for high mileage cars?

High mileage oil is designed for vehicles with more than 75,000 miles. … As a rule of thumb, most new cars require synthetic oil. Older cars generally run well with conventional oil, unless your vehicle has more than 75,000 miles on it, in which case high-mileage oil is recommended.

What is considered high mileage on a car for oil?

It all depends on how the vehicle has been driven and maintained. Some people might consider switching to a high mileage oil at 200,000 miles, while others may want to change to a high mileage oil at 80,000 miles. For the average driver, anything over 100,000 miles could safely be considered a high mileage vehicle.