Quick Answer: Which Oil Is Thicker 5w30 Or 10w30?

Which oil is thicker 10w30 or 10w40?

The viscosity of hot oil is measured using different test parameters than when the oil is cold, so the numbers after the “W” don’t relate to the numbers in front of the “W”.

The difference between 10W-30 and a 10W-40 is the high temperature viscosity.

Obviously, a 10W-40 is thicker than a 10W-30 at high temperature..

Should you use thicker oil in an older 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.

What is the best engine oil for high mileage?

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.

Should I use thicker oil in winter?

The W Means Winter Motor oil is measured by its viscosity—basically how thick or thin it is. … The lower the W number, the better the oil will perform in colder temperatures. Typically, a 5W oil is recommended for winter use, but synthetic oils can be formulated to flow even more easily when cold.

What weight oil should I use for high mileage?

In most temperate climates, a 10W oil will suffice, but the best motor oil for high mileage engines in cold weather will start with 5W or even 0W.

Can the wrong oil mess up your engine?

The brand of motor oil matters little, but its viscosity grade (10W-30, for example) is important. Use only what the owner’s manual specifies. Using the wrong oil can lead to reduced lubrication and shorter engine life. If the manual says to use synthetic oil, do so.

Can I use 5w30 instead of 10w30?

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.

Is 5w30 or 10w30 better for winter?

At operating temperatures, both oils will have the same viscosity (30) and will flow and protect identically. 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.

Is Thicker oil better for high mileage cars?

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 happens if you 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.

Does 10w30 hurt 5w20 engine?

Modern cars are designed to use lower viscosity oil ranges, so they can properly lubricate ( see attachment) Going from 5w-20 to 10w-30 should cause no harm for one oil change. But if you engine as designed for 5W-20, give it 5W-20.

Does oil get thicker as it warms up?

Oil weight, or viscosity, refers to how thick or thin the oil is. … Your engine needs oil that is thin enough for cold starts, and thick enough when the engine is hot. Since oil gets thinner when heated, and thicker when cooled, most of us use what are called multi-grade, or multi-viscosity oils.

For Example: 10W30 When you start a cold engine up again, motor oil needs to travel to the top of the engine, where it trickles back down. Since motor oil is vital to lubricating your engine, it needs to move quickly and low viscosity helps it do just that.

What is the best oil additive for high mileage engines?

The Best Oil Additive.1 Sea Foam sf16.2 Archoil AR9100.3 Liqui Moly Cera Tec Friction Modifier.4 Lucas Heavy Duty Oil Stabilizer.5 Genuine Ford Fluid XL-3 Friction Modifier.6 Red Line Break-In Oil.7 BG MOA Oil Supplement.More items…•