Motorists have counted on Slick 50 since 1978 to protect their vehicle’s vital parts from friction and wear. Now, they can count on Slick 50 to deliver excellent value as well. From now until30th April, all Slick 50 products are on BUY ONE GET ONE FREE offer at Halfords. This includes the classic Slick 50 Engine Treatment (regular and synthetic), Power Steering Fluid, Fuel System Treatment and Manual Gearbox Treatment. This is a rare opportunity to get these highly rated (4 stars and above) products so hurry in to your nearest Halfords store now!