General Motors has published some of its designs for more eco-friendly cars on one of its blogs.
One concept the firm is considering is called “Bare Necessities"; it centres on binning all unnecessary luxuries from cars and trucks.
Customers have been invited to talk on a microsite, dubbed “The Lab”, about what they would like to see sacrificed in the name of improved fuel economy.
A number of the blog's users have commented with suggestions ranging from losing carpets and chrome to using composite materials for the bodywork.
Some people have recommended using diesel motors and utilising better aerodynamics for small trucks. The aim is for designers and engineers to get a feel for what the customers want. They may then use some of the suggestions on future cars.
As part of the restructuring of GM, company bosses are now looking to include customers as much as possible in model planning.