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kohler ECV749 #4469480
07/24/17 09:40 PM
07/24/17 09:40 PM
Joined: Feb 2011
Posts: 1,260
Golden Meadow, LA
mobilaltima Offline OP
mobilaltima  Offline OP
Joined: Feb 2011
Posts: 1,260
Golden Meadow, LA
Gravely Commercial Pro Turn 260, 60 inch cut. It has a Kohler V-twin Model ECV749, 26.5 hp with 1,250 hours. I use it nearly everyday at work(thankfully have not had to sit in that old work truck at the gate lately) and it gets worked hard. I've been using 15W40 at 50-60 hr intervals with no problems, the one time I tried 20W50 it really did seem to lack power, so I've been using 15W40 since. We crank them up(we have two of them), let them idle for 2-3 minutes, then its full throttle till both fuel tanks run out, constantly bogging down in thick,wet grass shutting off the engines stopping in between. I looked up the oil specs for this engine, it shows 10W30 for 0 to 100 degrees, and straight 30 for 50 to 100 degrees. With 1,250 hrs on it, would it be safe to use straight 30, and would it maybe free up some power over the 15W40? Whatever I decide to go with, I'll start changing it at the recommended 100 hrs.


2006 2500 Dodge 5.9 Cummins Mobil Delvac 15W40, Fleetguard Stratapore 90k miles
Early '99 F250 ECLB 7.3 Stroker, 223k miles
Re: kohler ECV749 [Re: mobilaltima] #4469503
07/24/17 10:12 PM
07/24/17 10:12 PM
Joined: Nov 2009
Posts: 5,121
Houston, Texas
motor_oil_madman Online content
motor_oil_madman  Online Content
Joined: Nov 2009
Posts: 5,121
Houston, Texas
I think 15w40 would be fine, 20w50 is overkill and might affect the hydraulic lifters


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: kohler ECV749 [Re: mobilaltima] #4469505
07/24/17 10:16 PM
07/24/17 10:16 PM
Joined: Nov 2009
Posts: 5,121
Houston, Texas
motor_oil_madman Online content
motor_oil_madman  Online Content
Joined: Nov 2009
Posts: 5,121
Houston, Texas
Thats pretty much what I'll do for the first start of the day. Start the mower and then I'll go and put the blower and weed whacker in the backyard. I don't always warm them up though, but most times I'm not really cutting thick grass so it's not like the engine is heavily loaded.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: kohler ECV749 [Re: mobilaltima] #4469620
07/25/17 04:43 AM
07/25/17 04:43 AM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
Kohler is all over the place with those graphs.
They list 20w50 for my 33 HP and suggest 10w30 is like a winter blend.
I think T6 Rotella 5w40 would be ideal for your commercial mower.
Great oil.

Re: kohler ECV749 [Re: mobilaltima] #4469755
07/25/17 07:29 AM
07/25/17 07:29 AM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
This is one of the many graphs Kohler puts out
And they change rapidly
This is for the Command series

Re: kohler ECV749 [Re: mobilaltima] #4469757
07/25/17 07:30 AM
07/25/17 07:30 AM
Joined: Nov 2009
Posts: 5,121
Houston, Texas
motor_oil_madman Online content
motor_oil_madman  Online Content
Joined: Nov 2009
Posts: 5,121
Houston, Texas
A mower needs synthetic oil imo.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: kohler ECV749 [Re: motor_oil_madman] #4469764
07/25/17 07:39 AM
07/25/17 07:39 AM
Joined: Jul 2015
Posts: 3,772
MD
AirgunSavant Offline
AirgunSavant  Offline
Joined: Jul 2015
Posts: 3,772
MD
I'm with that since it is a commercial machine and run hard plus at high temps

Originally Posted By: motor_oil_madman
A mower needs synthetic oil imo.


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