15 Jun 2016 --- FUEL10K is stepping up its marketing spend this year, supporting the launch of their reformulated breakfast drinks, with a targeted consumer activation campaign and by sampling over half a million units by the end of the year. A key element is FUEL10K’s new role as the Official Breakfast to Tough Mudder – the 10-12 mile ‘muddy’ endurance races designed to challenge the toughest of the mudders.