It's actually not just those engines.Any engine can build up deposits do to incorrect oil viscosity,lack of maintenance or driving the engine harder than it was designed the run.In cold weather you want to run a thinner viscosity oil due to oils tendency to thicken up in colder temperatures and vice versa.There are many products that claim to help prevent and clean out engine deposits.Z-max is one of the most popular and can be purchased from any automotive parts stores for pretty cheap.Good luck
