Yes, it is possible to add additional drivers to a Safeco auto insurance policy. This is a common practice for individuals who want to include family members or others who may drive the insured vehicle. When adding a driver, you will need to provide information such as their name, date of birth, and driving history. It is essential to note that the new driver must meet certain eligibility requirements and that adding drivers can potentially affect the premium. Different factors, such as the driver's age and driving record, will be taken into account. For detailed information about adding drivers, it may be beneficial to check the current Safeco website or refer to policy documentation for guidelines and instructions.