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Re: HydroGear factory fill EZT-2200 UOA [Re: SOHCman] #4865820 09/11/18 05:40 AM
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Patrick0525 Offline OP
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Originally Posted by SOHCman
The word on the street is hydro units love ZDDP, zinc in particular. Exmark used to only recommend M1 15w-50, but ever since Mobil lowered the zddp levels in it they had to start offering their own Exmark branded fluid. No idea who actually makes it but its alleged to be loaded with zinc.


Amsoil Hydrostatic Transmission zddp levels. https://bobistheoilguy.com/forums/ubbthreads.php/topics/4865819#Post4865819


2014 Toyota Venza 2GR-FE 93K mi
2009 Lexus ES350 2GR-FE 49K mi
Fram Ultra filter XG9972
TGMO or Idemitsu Zepro 0w20 (winter)
PP 0w20 (spring/summer/fall)


Re: HydroGear factory fill EZT-2200 UOA [Re: Patrick0525] #4878178 09/24/18 09:27 PM
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MolaKule Offline
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Was this the factory fill?

If there are no babbit bearings, and it appears they are using only roller bearings, the lead must have come from a chemistry component added at the factory, most likely Lead(2+) di(2-naphthoate).

Since there appears only to be spur gears involved, ZDDP levels of 700 ppm are sufficient. No need for EP additives.

The analyzed oil appears to about an 80W90.

Last edited by MolaKule; 09/24/18 09:38 PM.

The value of a scientific theory is its ability to prompt further study, not that it has any relation to the established facts of scientific reality.
Re: HydroGear factory fill EZT-2200 UOA [Re: MolaKule] #4878205 09/24/18 09:56 PM
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Patrick0525 Offline OP
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Originally Posted by MolaKule
Was this the factory fill?

If there are no babbit bearings, and it appears they are using only roller bearings, the lead must have come from a chemistry component added at the factory, most likely Lead(2+) di(2-naphthoate).

Since there appears only to be spur gears involved, ZDDP levels of 700 ppm are sufficient. No need for EP additives.

The analyzed oil appears to about an 80W90.



Yes, this is a factory fill on my Club Cadet ZTR.


2014 Toyota Venza 2GR-FE 93K mi
2009 Lexus ES350 2GR-FE 49K mi
Fram Ultra filter XG9972
TGMO or Idemitsu Zepro 0w20 (winter)
PP 0w20 (spring/summer/fall)


Re: HydroGear factory fill EZT-2200 UOA [Re: Patrick0525] #4963925 12/28/18 10:57 PM
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racinjason Offline
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Originally Posted by Patrick0525
Originally Posted by MolaKule
Was this the factory fill?

If there are no babbit bearings, and it appears they are using only roller bearings, the lead must have come from a chemistry component added at the factory, most likely Lead(2+) di(2-naphthoate).

Since there appears only to be spur gears involved, ZDDP levels of 700 ppm are sufficient. No need for EP additives.

The analyzed oil appears to about an 80W90.



Yes, this is a factory fill on my Club Cadet ZTR.




Just did a set of ezt’s on a 5 of 2012 rzt50. What came out looked like gear oil to me. The noisy side had a foul odor.

I put couple capfuls of Lucas assembly lube in each, filled with Napa 15w-50 and it’s pretty quiet now.

I pulled them, flipped them, refilled. Vents were clear, no water I could see.

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