#dot4

*rubs hands together* I brainrot about this one so much.

SO Dawn of the Fourth Day is a roleplay I have with @aheavenscorner BUT we're planning to turn it into a fic! It currently stands at 43k words and we're 3/4ths into the plot.

The premise is a post majoras mask reunion. Link returns to Hyrule after 3 years and Zelda welcomes him with the biggest hug ever cause she's missed him so much (she also does remember the events of the other timeline) The whole story arcs withing 2 years with them being together again, becoming a couple and dealing with a nusiance that is Zelda's aunt and an arrogant suitor potential from her father.

Its so ram packed with fluff and hurt/comfort (and some angst drabbled in) but mainly fluff.

Sharing two snippets because I can

I will do anything to prove that my love is stronger than my family's failed ways. The hero felt a burning sensation in his chest, similarly to when his princess had intertwined her fingers through his hair and nearly kissed him. His gaze flitted down to her lips, just like it had for the past week- only this time he leaned to meet them with his own. It soft with a lingering affection, but the lightning in his veins still roared. As he pulled away, though not far, he looked into Zelda's eyes with a newfound life within his own. "You already have, darling." She was unique, no one in her family was like his Zelda. And he wouldn't have it any other way. ___

If Zelda’s heart could beat any harder, she was convinced it would jump out of her chest. The light was dim, but she was wise and very much not blind — she knew exactly where Link’s gaze had travelled to, for hers had done very much the same. There was a lingering anticipation in the air between them, a breath held in both of their lungs. For all that mattered, time was frozen, and neither would notice if it were not. She met his lips halfway.

And

This is for day 10- laughter

Naturally it's oot zelink and it's from a scene in me and @aheavenscorner rp "Dawn of the Fourth Day" (yes again lol)

Link could not recall a more happier moment than the one he was in now. He felt himself melt into her, more than he ever had before, and swore that his heart had soared into the heavens from the euphoria. His ears twitched with pure joy; laughter escaped his lips, one that hadn't since he was a boy in the forest. His hand found its way to her cheek, wiping her tears away before he leaned in to kiss her again.

I love you.

Modern vehicles rely on multiple performance fluids to maintain safety, efficiency, and durability. Among the most essential are coolant oil, motorcycle coolant, engine coolant, and hydraulic brake fluids like DOT 4.0 and DOT 3.0. These fluids work together to manage engine temperature and provide reliable braking performance under demanding conditions.

Proper fluid selection and maintenance are critical for both everyday driving and high-performance applications.

What is Coolant Oil?

Coolant oil refers to specialized cooling fluids designed to regulate engine temperature and prevent overheating. Unlike lubricating oil, coolant oil circulates through the cooling system to absorb and dissipate heat generated during combustion.

Functions of Coolant Oil

Maintains optimal engine temperature

Prevents overheating

Protects metal components from corrosion

Improves engine efficiency

Extends engine life

Modern coolant oil contains additives that enhance thermal transfer and protect internal engine parts.

Understanding Engine Coolant

Engine coolant is a mixture of antifreeze and water that flows through the radiator and engine passages. It removes excess heat and maintains consistent operating temperature.

Key Benefits of Engine Coolant

Heat absorption and dissipation

Rust and corrosion protection

Freeze protection in cold climates

Boiling point elevation

Reduced engine wear

Without proper engine coolant, engines can overheat quickly, causing severe mechanical damage.

Importance of Motorcycle Coolant

Motorcycles operate at higher engine RPMs compared to cars, producing intense heat within compact engine designs. Motorcycle coolant is specially formulated to handle these conditions.

Why Motorcycle Coolant is Essential

Maintains stable engine temperature during traffic and long rides

Prevents overheating in air-restricted engine layouts

Protects aluminum engine components

Improves combustion efficiency

Enhances riding reliability

High-quality motorcycle coolant ensures consistent performance even in hot climates and stop-and-go riding conditions.

How Cooling Systems Work

The cooling system circulates coolant through several components:

Radiator

Water pump

Thermostat

Cooling passages

Expansion tank

Heat from the engine transfers into the coolant, which then releases heat through the radiator before recirculating.

This continuous process keeps the engine operating within safe temperature limits.

Introduction to Brake Fluids: DOT 3.0 and DOT 4.0

While coolants control temperature, brake fluids ensure safety. DOT 3.0 and DOT 4.0 are widely used hydraulic brake fluids designed to transfer braking force efficiently.

Brake fluids must withstand extremely high temperatures generated during braking.

DOT 3.0 Brake Fluid

DOT 3.0 brake fluid is commonly used in standard vehicles and motorcycles.

Features

Reliable braking performance

Suitable for normal driving conditions

Glycol-based formulation

Good lubrication properties

Cost-effective maintenance solution

DOT 3.0 works well for everyday commuting vehicles with moderate braking demands.

DOT 4.0 Brake Fluid

DOT 4.0 brake fluid offers improved performance compared to DOT 3.0, especially under high-temperature conditions.

Advantages

Higher boiling point

Better resistance to brake fade

Enhanced moisture tolerance

Ideal for performance motorcycles and modern vehicles

Consistent braking response

DOT 4.0 is recommended for vehicles exposed to heavy braking or high-speed driving.

DOT 3.0 vs DOT 4.0 Comparison

Feature

DOT 3.0

DOT 4.0

Boiling Point

Standard

Higher

Performance Level

Normal driving

High performance

Moisture Resistance

Moderate

Improved

Application

Daily vehicles

Performance & heavy braking

Cost

Lower

Slightly higher

Choosing the right brake fluid depends on vehicle requirements and driving conditions.

Why Cooling and Braking Fluids Work Together

Engine cooling and braking systems are equally important for vehicle safety and performance.

Combined Benefits

Prevent engine overheating

Maintain consistent braking power

Improve driving safety

Extend component lifespan

Reduce maintenance costs

A properly maintained vehicle always includes both high-quality coolant oil and brake fluid.

Maintenance Tips for Coolants and Brake Fluids

Coolant Maintenance

Check coolant level regularly

Use recommended coolant type

Flush cooling system periodically

Inspect radiator hoses for leaks

Brake Fluid Maintenance

Replace brake fluid every recommended interval

Avoid mixing different fluid types

Keep system sealed from moisture

Monitor braking response

Routine maintenance prevents major mechanical failures.

Signs You Need Coolant or Brake Fluid Replacement

Coolant Warning Signs

Engine overheating

Coolant discoloration

Sweet smell from engine area

Frequent temperature fluctuations

Brake Fluid Warning Signs

Soft brake pedal

Reduced braking efficiency

Brake warning light

Dark or contaminated fluid

Immediate replacement helps maintain safety and performance.

Future Trends in Cooling and Brake Fluid Technology

Modern fluid technology continues advancing with:

Long-life coolant formulations

Environmentally friendly additives

High-temperature brake fluids

Enhanced corrosion inhibitors

Improved thermal efficiency chemistry

These innovations support modern engines and high-performance motorcycles.

Conclusion

High-quality coolant oil, motorcycle coolant, and engine coolant are essential for maintaining safe engine temperatures and ensuring long-term reliability. At the same time, DOT 3.0 and DOT 4.0 brake fluids provide dependable braking performance and vehicle safety.

Brake fluid is a critical component of any vehicle's braking system. It is responsible for transferring the force from the brake pedal to the brakes and providing a smooth, efficient braking experience. But what exactly is brake fluid made of?

Brake fluid is composed primarily of glycol-ether based fluids. These fluids are a combination of ethylene glycol and diethylene glycol, along with corrosion inhibitors and other additives. The type of brake fluid used in a vehicle is determined by the manufacturer. Generally, it will either be a DOT 3, DOT 4, or DOT 5 type.

DOT 3 brake fluid is the most common type found in vehicle brake systems. It is composed of polyglycol-ether, which is a mixture of ethylene glycol and diethylene glycol. It is a hygroscopic fluid, meaning it absorbs moisture from the air, and can cause corrosion and reduce the boiling point of the fluid if not properly maintained.

DOT 4 brake fluid is also composed of polyglycol-ether, but it has a higher boiling point and is less hygroscopic than DOT 3. It is designed for vehicles with more demanding braking requirements, such as those found in race cars, or vehicles that operate in high-heat conditions.

DOT 5 brake fluid is the most advanced type of brake fluid. It is composed of silicone-based fluids, which are non-hygroscopic and have a higher boiling point than DOT 3 or DOT 4 fluids. DOT 5 is not compatible with other types of brake fluid, so it is important to ensure that the correct type is used in a vehicle.