* Highly Flammable: Petrol is incredibly flammable and volatile. Using it in a dry cleaning process would create a significant fire hazard, endangering both workers and customers.

* Toxic and Harmful: Petrol contains various harmful chemicals that are toxic to humans and the environment. Exposure to these chemicals can cause skin irritation, respiratory problems, and even long-term health issues.

* Not Effective for Stain Removal: While petrol can dissolve some oily stains, it's not effective at removing many other types of stains found in clothing. Dry cleaning solvents are designed specifically for stain removal and fabric cleaning.

* Environmentally Damaging: Petrol is a petroleum product and its use and disposal would contribute to environmental pollution. Dry cleaning solvents are now often chosen for their lower environmental impact.

Dry cleaning solvents are specifically designed to be:

* Non-flammable: They are formulated to be safe for use in a dry cleaning environment.

* Less toxic: While some dry cleaning solvents can still be harmful if misused, they are generally considered safer than petrol.

* Effective for Stain Removal: These solvents are capable of removing a wider variety of stains and are safe for use on delicate fabrics.

* Environmentally Friendly: The modern dry cleaning industry is moving towards using more environmentally-friendly solvents, such as hydrocarbon-based solvents.

Therefore, the inherent dangers and limitations of petrol make it completely unsuitable for use as a dry cleaning solvent.