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One lap of the Web: Ponycar birthdays, forgotten Hungarian racetracks and an Acura NSX

Chevy took some time this week to say happy birthday to its archrival, the Ford Mustang. The bowtie brand said that "healthy competition" between the Camaro and Mustang has been a "driving force for constant improvement." Check it out over at World Car Fans. Petrolicious has a handful of photos from a nearly forgotten track in Budapest, Hungary.

Will Audi's e-fuel replace gasoline and diesel?

From electric to ethanol and even hydrogen fuel cells, we’ve seen a lot of advancements in the automotive world when it comes to alternative fuel solutions. But Audi has a new technology up its sleeves in the form of synthetic e-fuel. Synthetically engineered e-fuel can replace gas and diesel, and so far Audi claims to be making significant strides in its performance and viability.

Renault working on 141mpg plug-in hybrid concept

Renault is working on a 141mpg plug-in hybrid concept car, according to Renault head of research, advanced studies and materials, Remi Bastien. Speaking to MSN Cars at Renault’s recent ‘Innovations’ event – showcasing the French manufacturer’s new technology that will underpin its next-generation models – Bastien revealed the new car will make its debut in 2014. On Bing: see pictures of Renaults Find out how much a used Renault costs on Auto Trader This means the ‘2l/100km’ concept car will likely make its first public appearance at the 2014 Geneva Motor Show, alongside the firm’s new rear-engined Twingo city car.