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John Deere Zero-Turn Mower Transmission And Engine Oil Options

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John Deere ZTrak zero-turn lawn mowers are some of the more popular models on the market. Let’s take a look at AMSOIL synthetic transmission and engine oil substitutes for each model. We will also list the oil change intervals for each ZTrak transmission and engine. If you have questions, feel free to contact us using the form on this page.

AMSOIL products discussed on this page include:

Z300 Series Zero-Turn Mower Transmission And Engine Oil

Models include Z335E, Z335M, Z345M, Z345R, Z355E, Z355R, Z365R, Z375R- Gasoline Engines

Z300 Transmission Oil And Service Interval

The transmission used in the Z300 Series is a “sealed unit”. Therefore, the oil cannot be changed.

Z300 Engine Oil And Service Interval

John Deere suggests SAE 30 or SAE 40 for Z300 series motors. AMSOIL Small Engine Synthetic 10W-30 or 10W-40 can replace straight 30 or 40-weight oils.

Deere suggests changing the Z300 Series engine oil every 50 hours or once per year (whichever comes first).

Z500 Series Zero-Turn Mower Transmission And Engine Oil

Models include Z515E, Z530M, Z530R, Z545R- Gasoline Engines

Z500 Transmission Oil Type And Service Interval

The transmissions on the Z500 Series transmission do not require oil and filter changes. However, the oil level should be maintained at the “Full” line.

John Deere suggests hydraulic fluid meeting the John Deere “J20C” specification or 10W-30 motor oil. The AMSOIL product that meets this spec is AMSOIL Synthetic Tractor Hydraulic/Transmission Oil.

Z500 Engine Oil And Service Interval

John Deere suggests 10W-30, 10W-40, 15W-40, SAE 30 or SAE 40 motor oil meeting the API SJ specification (or newer). The AMSOIL replacement is Small Engine Synthetic 10W-30 or 10W-40.

The recommended engine oil change interval for the Z500 Series is every 50 hours or once per year, whichever comes first.

Z700 Series Zero-Turn Mower Transmission And Engine Oil

Z720E, Z730M, Z735E, Z735M, Z740R- Gasoline Engines

Z700 Transmission Oil Type And Service Interval

John Deere suggests hydraulic fluid meeting the “J20C” specification. The AMSOIL product that meets the John Deere J20C spec is AMSOIL Synthetic Tractor Hydraulic/Transmission Oil.

Change transmission oil and filter every 250 hours or once per year, whichever comes first.

Z700 Gasoline Engine Oil And Service Interval

John Deere suggests 10W-30, 10W-40, 15W-40, SAE 30, SAE 40 meeting API SJ or newer. The AMSOIL replacement is Small Engine Synthetic 10W-30 or 10W-40.

The recommended engine oil change interval for the Z700 Series is every 50 hours or once per year (whichever comes first).

Z900 Gasoline Series Zero-Turn Mower Transmission And Engine Oil

Z-Trak Pro Series- Z900B, Z900M, Z900R Z900E, Z920M, Z930M, Z945M EFI, Z945M, Z955M, Z960M, Z970R- Gasoline Engines

Z900 Transmission Oil Type And Service Interval

John Deere suggests a hydraulic fluid meeting the “J20C” specification. The AMSOIL substitute that meets the John Deere J20C spec is AMSOIL Synthetic Tractor Hydraulic/Transmission Oil.

The transmission oil and filter should be changed after a 300-hour break-in period. Then every 500 hours or once per year thereafter.

Z900 Gasoline Engine Oil And Service Interval

John Deere suggests 10W-30, 10W-40, 15W-40, SAE 30, SAE 40 meeting API SJ or newer. The AMSOIL replacement is Small Engine Synthetic 10W-30 or 10W-40.

The recommended engine oil change interval for the Z900 Series (gasoline engine) is every 100 hours or once per year (whichever comes first).

Z994R Z-Trak Pro Series Diesel

Z9994R Transmission Oil Type And Service Interval

John Deere suggests a hydraulic fluid meeting the “J20C” specification. The AMSOIL product that meets the John Deere J20C spec is AMSOIL Synthetic Tractor Hydraulic/Transmission Oil.

The transmission oil and filter should be changed after 300-hour break-in period. Then every 500 hours or once per year thereafter.

Z994R Diesel Engine Oil And Service Interval

John Deere recommends diesel engine oil (0W-40, 5W-40, 15W-40) meeting the API CD (or higher), ACEA Oil Sequence E3 (or higher). Our suggestion is AMSOIL Signature Series Max-Duty Synthetic Diesel Oil or AMSOIL Heavy-Duty Synthetic Diesel Oil.

The recommended engine oil change interval is every 250 hours.

Z997R Z-Trak Pro Series Diesel

Z997R Transmission Oil Type And Service Interval

John Deere suggests a hydraulic fluid meeting the “J20C” specification. Our product that meets the John Deere J20C spec is AMSOIL Synthetic Tractor Hydraulic/Transmission Oil.

The transmission oil and filter should be changed after a 50-hour break-in period. Then every 500 hours or once per year thereafter.

Z974R Diesel Engine Oil And Service Interval

Deere recommends diesel engine oil (0W-40, 5W-40, 15W-40) meeting the API CJ-4 (or higher), or ACEA Oil E6, E9 (or higher) or JASO DH-2. Our replacement is AMSOIL Signature Series Max-Duty Synthetic Diesel Oil or AMSOIL Heavy-Duty Synthetic Diesel Oil.

The engine oil change interval after break-in is 50 hours. Then every 250 hours or once per year thereafter.

AMSOIL Synthetic Replacements For John Deere Hydraulic/Transmission And Engine Oil

Hydrostatic/Transmission Oil

AMSOIL Synthetic Tractor Hydraulic/Transmission Oil meets both the John Deere J20C and J20D (winter grade) specifications. This product is ideal for use in all John Deere Z-Trak Zero-turn hydrostatic/transmission systems.

This AMSOIL Hydraulic/Transmission Oil a top-tier, 100% synthetic product. Therefore, it is an upgrade over the mineral John Deere Hy-Gard and also the Low-Viscosity Hy-Gard Transmission & Hydraulic Oil.

Features include:

  • Robust wear protection
  • Consistent performance in extreme heat or cold
  • Capable of long service life
  • Conditions seal and hoses
  • Protects against internal rust and corrosion during storage

Gasoline Engine Oil

For John Deere Zero-Turn mowers with gasoline engines, we can’t imagine a better option than AMSOIL Synthetic Small Engine Series. The 10W-30 or 10W-40 options are suggested for ZTrak gasoline engines. This commercial-grade motor oil is designed to handle long-days and tough conditions. Features include:

  • Robust wear control
  • Over-built to withstand long service intervals
  • Handles extreme hot or cold climates
  • Protects engine internals from rust and corrosion

Diesel Engine Oil

John Deere diesel-powered zero-turn lawn mowers can use 15W-40, 5W-40 or 0W-40 diesel engine oil. This covers both the Z994R and Z997R models. The AMSOIL synthetic diesel engines oils that cover the specifications for these models are the ultra-premium Signature Series Max-Duty or the value-priced Heavy-Duty Series.

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What Is The Shelf Life Of An Opened Bottle Of Motor Oil?

A reader asks: How long is motor oil usable after the bottle has been opened?

Our answer: Once the seal has been cracked on a bottle of motor oil, the remaining oil should be used up within one year. This guideline also applies to transmission oil and gear oil. Opened bottles of both synthetic and conventional motor oils would have a similar lifespan.

Three Reasons Why Motor Oil Should Be Used Within A Year Of Opening

  1. Condensation- After the seal on the bottle has been broken, the interior is more prone to condensation. Once the oil level in the bottle is lowered, there is more open space for condensation to develop.
  2. Oxidation- As the motor oil becomes exposed to oxygen over time, the chemical makeup of the motor oil changes. Simply put, once the oxidation process has started in motor oil, the capabilities of the oil are severely limited and unpredictable. Therefore, that partial bottle of motor oil that has been sitting on shelf for several years should be used in an oil can or sent to recycling.
  3. Additive Fallout- Over time, the ingredients that make up the motor oil formula can start to degrade. This compromises the capabilities and service life of the motor oil. This process would likely take much longer than a year. This can happen in sealed bottles that have been stored for too long as well.

Motor Oil Storage Tips

  • Store motor oil in dry conditions. Don’t leave motor oil bottles out in the yard or in the back of the truck.
  • Do not store the oil in temperatures below it’s cold-pour-point. If the motor oil freezes and “gels”, this will shorten the lifespan of the motor oil.
  • The ideal storage temperature range for motor oil is between 0°C (32°F) and 29°C (85°F).

Shelf Life Of Unopened Motor Oil Bottles

The shelf life of sealed, unopened motor oil, transmission fluid or gear oil is roughly 5 years. Please note the storage tips above to maximize the shelf life of new motor oil.

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