Question: Is 5w30 Good For High Mileage?

Why do high mileage cars burn oil?

Some oils may be more beneficial than others because they contain conditioners purported to rejuvenate seals to prevent or stop oil leaks, a common ailment in engines with high mileage.

When valve-guide seals wear out, motor oil can leak into combustion chambers and the engine will literally start burning oil..

How often should you change high mileage oil?

Depending on vehicle age, type of oil and driving conditions, oil change intervals will vary. 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.

Does high mileage oil really make a difference?

High-mileage oils have ingredients to take care of older engines, like conditioners, seal swells, antioxidants, detergents and wear or friction additives. … The higher-mileage oils are formulated with seal conditioners that increase flexibility and restore shape, which can help prevent leaks in the long run.

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.

Is 10w30 better for high mileage?

Both high mileage 5w30 and 10w30 engine oils have the same additives, the only difference is the viscosity at cold startups. Since both oils have the same operating temperature viscosity (30) and additives, they will perform exactly the same. However, 5w30 flows much better than 10w30 during cold starts.

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 use 10w 30 instead of 5w30?

Yes. 5w30 and 10w30 are both 30 weight oils and the exact same thickness in your engine when it is at operating temperature. The 5w30 is better because it thickens less when cool or cold. 80% of wear occurs at start up.

Is high mileage oil a gimmick?

High mileage oil prevents or may even stop some engine oil leaks because of additives in the oil that softens the engine seals and they swell a bit. No it is not a gimmick. Long-life oils have a lot of additives in them to enable them to function effectively for around 50% longer than a regular oil of the same spec.

Which oil is best for high mileage engines?

But also includes seal conditioners to prevent leaky seals and help restore them. Pennzoil high mileage is made for engines with 75,000 or more miles….Other Options Include:Castrol GTX Synthetic Blend.Mobil1 High Mileage Synthetic.Royal Purple High Mileage Synthetic.Castrol High Mileage Full Synthetic.

Is synthetic oil better for high mileage cars?

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 mixing 5w30 with 10w30 bad?

Mixing different oils will not improve the performance or efficiency of the engine in any way. … 5w30 and 10w30 are both 30 weight oils and the exact same thickness in your engine when it is at operating temperature. The 5w30 is better because it thickens less when cool or cold. Thinner oil gets to the top end faster.

Is 5w30 better than 10w30?

5w30 is less viscous than 10w30. 5w30 is also the thinner engine oil of the two at lower temperatures. … 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.