The Mach-E GT reflected in a puddle by the Rotterdam harbour

Why I share my car

Alexander, 20 March 2026

In Europe a car stands still 92 per cent of the time on average. That applies to a Mustang Mach-E GT too. When I rent it out, it gets driven, instead of waiting in a parking space.

Keeping products in use

My work is about the circular economy. With Circular Intelligence I help organisations use products and raw materials for as long and as well as possible. Sharing is one of the simplest ways to do that.

The more often a car is used, the more you get out of everything that went into it, from the steel and the battery to the energy it took to make it.

Read more about Circular Intelligence

What sharing achieves

From Dutch research, summarised in 2026 by Rijkswaterstaat:

  • One shared car replaces 9 to 14 privately owned cars.
  • A new car weighs just over 1,500 kilos on average. So for each shared car, 12 to 20 tonnes of steel, aluminium, plastic and battery raw materials don't need to be extracted and processed.
  • People who rent a car from a private owner have 30 per cent fewer cars on average.
  • Car sharers drive about 20 per cent fewer kilometres.
  • That saves 150 to 219 kilos of CO2 per car sharer per year.
  • A shared car saves 37 to 87 square metres of parking space.
The Mach-E GT from above with the headlights on

In my work at Circular Intelligence I call that Linear Resource Use Avoided, or LRUA. It means raw materials that aren't taken out of the ground, processed and eventually thrown away. That's what matters to me, as well as the CO2.

It also has to add up

Those principles are also why I started my own company, Circular Intelligence. A product has to be used, and it has to pay off economically for the people who use it. That applies to me too, and really to me most of all.

I didn't get this car to leave it standing still. By renting it out, it pays back part of its own costs, and other people drive a car they wouldn't otherwise be quick to try.

Everyone gets more out of it

When I share the car, everyone gets more out of it. I pay back part of the costs. You drive a car you wouldn't otherwise be quick to buy, without having to own it. And everything that went into it, from the steel to the battery, is put to better use. That way a product stays valuable for everyone who uses it.

Circularity is mostly a marketing question

Most circular solutions already exist. The hard part is showing people what's in it for them. A shared car is a good example: the technology is simple, but it only works when enough people want to use it. That's why I make this car as attractive to rent as I can.

Cars are for driving

I love cars, including fast ones. I think it's a waste when a fast car only comes out on sunny Sundays. That's what the name Forrest Performance Rentals stands for: a car with performance that you simply use every day.

View of the Rotterdam harbour from the driver's seat of the Mach-E GT

ST Daily Driver

Alongside the Mach-E I'm working on ST Daily Driver, a project around the Ford ST. I'm building up a car from second-hand parts, and I want to sell on good used parts so they get used again.

See what renting costs

Source for the 92 per cent: Ellen MacArthur Foundation, Growth Within (2015). Weight of a new car: CBS (2025). The 12 to 20 tonnes is my own calculation: 8 to 13 cars that don't need to be made, times just over 1,500 kilos. Source for the car sharing figures: Rijkswaterstaat, car sharing factsheet (2026).

Rent from €129 a day

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€129 a dayMustang Mach-E GT in Rotterdam

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