Chemistry

Damage of adulterated gasoline


Frequent use of adulterated fuel can cause a number of problems with car engines, including:

- Gas pump plugging - which is in the tank and carries the fuel to the engine. As a result, the car begins to crash and the engine “dies”, and the car must be started several times before the car can start again.

- Corrosion of the electronic injection system - which is a set of parts that inject the exact amount of gasoline into the cylinders to run the engine, avoiding waste. If this system stops working, the car stops too.

- Accumulation of debris inside the engine - caused by burning of adulterated gasoline.

These residues occupy the moving space of the engine's moving parts, making their articulation difficult. Waste can also reach the oil pump.

Engine defects take longer to appear. They only appear about 5000 km after the first adulterated gasoline supplies.

Octane Index

For gasoline to be of good quality, it must have high octane rating. This means having high compressive strength.

Scientists are always looking for the most effective blend to improve the octane rating.

Octane Index Table of Some Substances

The limit set for the octane rating was zero to one hundred. But with the constant search for new mixtures, this limit has been exceeded.

SUBSTANCE

OCTANAGE

Heptane

0

Pent-1-eno

91

2,2,4-trimethyl pentane

100

Benzene

106

Methanol

107

Ethanol

108

Tert-butyl alcohol

113

Methyl tert-butyl ether (MTBE)

116

Tert-Butyl ether (ETBE)

118