In years past, when your vehicle began to run low on coolant, you could just top it off with water. With today's more sophisticated engines, this is no longer a suitable temporary repair. Every vehicle has its own specifications and mixtures of coolant/antifreeze. A 1998 Honda CR-V has particular antifreeze specifications as well.
The 1998 CR-V has a maximum capacity of 1.03 gallons with an automatic transmission and 1.06 gallons with a manual. This includes the radiator, hoses, engine and overflow tank. Verify the level after filling and before driving by checking to ensure the level is between the "Min" and "Max" line on the overflow bottle.
When filling up your radiator, do not just dump water into it. The CR-V's engine is made of aluminium; plain water can cause damage to it, and the antifreeze acts as a lubricant for the water pump. Add a mixture of 50 per cent water and 50 per cent antifreeze.
Honda recommends only using genuine Honda antifreeze/coolant. Honda does, however, state that you can use a major-brand, non-silicate coolant in temporary situations. As soon as possible, Honda recommends having this coolant exchanged for genuine Honda coolant.