How does the city decide where to purchase parts and services for their cars and equipment? We will either call 3 vendors and compare prices on similar products, or send out bids at the beginning of the fiscal year and lock on the best price for the year. What does the city do with vehicles after they are retired from service? We currently sell retired vehicles and equipment thru internet auctions. The web site is www.publicsurplus.com On the average, how many gallons of gasoline do the police motorcycles consume each day? 2.5 gallons average. How many motorcycles does the city have in their fleet? The city has 18 motorcycles.