The general rule for most vehicle types is once per year, but if you're an especially frequent driver, your car could benefit from a more regular service.
How often should you recharge your air-con? Most vehicle manufacturers recommend that you service or regas your car's air conditioning system every 1-2 years.
A conventional car can last for 200,000 miles. Some well-maintained car models will reach 300,000 or more miles total. The average passenger car age is.