"A trickle charger can also be used to start an engine with a cold battery. However, the best way is to check the vehicleâ¤™s cooling system and ensure that it has the right ratio of water and anti-freeze levels. A 50:50 ratio is most recommended for wintery conditions, but a 70:30 ratio may be necessary if temperatures are exceptionally low.It also wouldnâ¤™t hurt if vehicle owners visited a reputable center for auto repair in Washington DC for a routine checkup before setting off. After all, simple things like dirty engine filters need to be remedied because they take a toll on engine efficiency. Winter or not, an appointment with your mechanic is a good opportunity for an oil change; after all, itâ¤™s one of the most important maintenance routines for any vehicle."