70% rule is helping drivers SAVE fuel; know everything!

The "Rule of 70" suggests that fueling with ethanol is advantageous when its price is up to 70% of the value of gasoline. But does it save fuel?

It’s not news to any Brazilian that the price of fuel is increasingly expensive. Many depend on vehicles and have no other means of transport.

So, it’s natural for drivers to look for ways to save money when fueling their car. The Rule of 70 promises to help Brazilians in this mission. Understand.

Find out everything about the 70% rules – Credit: @jeanedeoliveirafotografia / pronatec.pro.br

For flex-fuel car drivers, choosing between gasoline and ethanol can mean significant savings when fueling up, especially when applying the "Rule of 70".

Surprisingly, a survey by the Energy Research Company (EPE) revealed that only four in ten flex vehicle owners are aware of this financial strategy.

The rule of 70 suggests that fueling with ethanol becomes advantageous when its price is up to 70% of that of gasoline, considering that ethanol yields around 30% less than gasoline.

However, many drivers, even though they are aware of the rule, do not carry out the calculations when refueling, with 51% of those who prefer gasoline and 60% of those who opt for ethanol not using a calculator to check the advantage.

The choice between fuels often comes down to price, but myths such as ethanol offering less power and range or gasoline keeping the engine cleaner still influence drivers’ decisions.

With the constant increase in fuel prices, saving gasoline has become a necessity for many Brazilians. Adopting simple habits when driving can make a difference in your wallet and the environment.

Preventive maintenance

Maintaining your vehicle up to date is essential for the engine to function properly and to reduce gasoline consumption. It is important to check tire inflation, oil level, air filter and other items regularly.

Smooth steering

Avoid sudden acceleration and braking, as this increases gasoline consumption. Try to maintain a constant speed and use engine braking whenever possible.

Air conditioning

Using air conditioning can increase fuel consumption by up to 20%. Use it only when necessary and keep the vehicle’s internal temperature at a moderate level.


Plan your routes in advance to avoid congestion and unnecessary stops. Choose times of lower traffic and use navigation apps that indicate more efficient routes.

Extra weight

Avoid carrying excessive weight in the vehicle, as this increases fuel consumption. Remove unnecessary objects from the trunk and organize your luggage efficiently.

Quality fuel

Fill up your vehicle at trusted stations and use good quality gasoline. Adulterated gasoline can damage the engine and increase fuel consumption.

Shared car and public transport

For short trips, consider using public transport, bicycle or shared car. This is an effective way to reduce gasoline consumption and contribute to the environment.

Technology in favor

There are several apps that can help you save gas. Use apps that monitor fuel consumption, indicate the stations with the best prices and offer tips for efficient driving.

Changing habits

Adopting conscious consumption habits can make a difference at the end of the month. Combine trips, shop in a single day and avoid unnecessary trips.

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