How to Change the Oil on a Cub Cadet Ultima

How to Change the Oil on a Cub Cadet Ultima

Regular oil changes are essential to keeping your Cub Cadet Ultima’s engine in working condition. Regular oil changes also maximize the lifespan of your mower and keep your Cub Cadet running smoothly and efficiently.

Before performing any maintenance on your Cub Cadet Ultima, refer to your owner’s manual for recommended maintenance and safety information. Maintenance instructions vary by model, so depending on your model our instructions may vary slightly. Check your owner’s manual to get instructions specific to your model, including information about the recommended oil type.

To change the oil on your Cub Cadet Ultima, begin by parking your mower on a flat, level surface. Turn the engine off and allow it to cool, remove the ignition key, disconnect the spark plug ignition wire to prevent accidental starting, and engage the parking brake.

It may be helpful to place a piece of cardboard under your mower to catch oil drips. Use an oil basin to catch the old oil when it is drained from the engine. Remove the dip stick and drain the oil. Use a ¾-inch and a ½-inch wrench to unthread the stopper plug from the oil outlet and allow the engine oil to completely drain. After the oil has drained, secure the stopper plug to the oil outlet.

Replace the oil filter with a new one. Use an oil filter wrench to unthread the oil filter from the engine. Use a rag to clean the area around the engine of any spilled oil.

Replace the oil filter and add a little oil to the seal of the new oil filter to help with the install. Use your hand to thread the new oil filter onto the engine. Do not overtighten. Use your oil filter wrench to snug the fit but do not overtighten.

Add new oil to your Cub Cadet Ultima. Use the oil recommended by the engine manufacturer and fill to the recommended levels. Replace the dip stick and check the engine oil levels.

Check the oil level with the dip stick. Depending on where it reads, you may need to add more oil. When checking the oil with the dip stick, place the dip stick into the oil and push it all the way down. Remove the dip stick, clean it with your rag, and place it in the oil one more time to check the oil level.

Reconnect the spark plug wire on your Cub Cadet Ultima.

Use our illustrated parts diagrams to locate any replacement parts you may need for maintenance on your Cub Cadet Ultima.

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2 thoughts on “How to Change the Oil on a Cub Cadet Ultima

  1. My RZT started burning a lot of oil It took 1 and1/2 Quarts of oil to mow my 1/2 acre lot. it still runs good but smokes a lot still has good power I don’t know what is wrong with it

    • Hi Robert. Because you mention that there is excessive oil loss along with the oil burn causing the smoke, it might be time to take it in. With oil burn, it can sometimes be due to overfilling, incorrect oil, damage to the dipstick, or the dipstick not being seated correctly but, because of the amount of oil you are losing, it is likely something more serious. When you take it in, make sure that the service department also replaces the spark plugs as those may accumulate a buildup of oil residue when oil is burned and can cause performance degradation.

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