Question: When Should I Switch From 5w30 To 10w30?

Is 10w30 or 5w30 better for winter?

The only difference between these two oils is cold flow ability: a 10w30 oil will move slower than a 5w30 oil during cold startups.

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..

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

In this respect, synthetic oil is far superior. Conventional oils will thicken in cold weather and thin out when very hot, while the viscosity of synthetic is much more uniform. … 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.

Are oil additives bad for your engine?

The researchers discovered what was already suspected, that the additive ZDDP (zinc dialkyldithiophosphate) does indeed reduce engine wear. Unfortunately, it also increases friction and can degrade the life of catalytic converters. Additionally, it does not work for engines made of any material other than steel.

Can you mix synthetic and regular oil?

The short answer is… yes. If you don’t have a choice, adding synthetic oil to regular oil can help you out in a pinch.

Is 5w30 or 10w30 better for summer?

5w30 is a great multigrade oil for use in low starting temperatures as well as high summer temperatures. It is also more fuel efficient since it creates less drag on the bearings and moving engine parts. 10w30 is thicker and may provide better sealing capability for older engines.

Is there a big difference between 5w30 and 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.

Which oil is best for high mileage engines?

5 Best Motor Oils for High Mileage Engines#1 – Mobile 1 High Mileage Synthetic Oil.#2 – Royal Purple HMX Synthetic Oil.#3 – Mobile Super High Mileage Synthetic Oil.#4 – Castrol GTX High Mileage Synthetic Blend Oil.#5 – Pennzoil High Mileage Synthetic Blend Motor Oil.

What is the best oil for high mileage trucks?

Valvoline High Mileage with MaxLife Technology. … Castrol Edge High Mileage. … Mobil 1 High Mileage. … AmazonBasics High Mileage Motor Oil. … Pennzoil High Mileage Motor Oil. … Lucas Oil High Mileage Oil Stabilizer. … Royal Purple HMX High Mileage Synthetic Motor Oil.

Should I use 10w30 or 5w30?

This oil is also the better of the two types for the old engines and also for those that use special fuel like biodiesel engines. With the greater sealing capability, 10W30 will be more effective at protecting the older engines than 5W30.

Is 5w30 good for high mileage?

For example, a high mileage engine oil rated at 5W30 will flow better and has a superior viscosity at low temperatures when compared to an engine oil with a rating of 10W40. If you live in a cold environment, it is always best to go with a high mileage oil that has a lower SAE rating like 5W30.

Is Thicker oil better for older engines?

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.

Is it safe to put synthetic oil in a high mileage engine?

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.

Is it OK to switch from 10w30 to 5w30?

You can use them interchangeably and would not likely even notice a difference at all unless it got really cold, then you’d find the 5w30 most likely cranking easier at cold start. You can absolutely run the 5w30 year around, no worries at all.

Should I use thicker oil in a high mileage 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.

What is the best oil for winter?

A lower number is better before the W for cold-weather performance, so a 5W oil is typically what’s recommended for winter use.