Valvoline VR-1 20W50

[mobilaltima]

Gravely Commercial 60 inch cut I use at work with a 29 hp Kohler Command Pro EFI. I change the oil every 50 hrs, as I always run it full throttle cutting levees, its always on an incline, severe service. I recently used Valvoline VR1 20W50 racing oil (black bottle) for the last oil change with a Napa Gold filter. Should the black or silver bottle VR1 be ok for 50 hr intervals? This particular oil is blue in color. The engine specs 10W30, but I've been running 15W40 and 20W50 with no problems. its a 2013 year model and has right at 1,087 hrs.

 

[The motor guy]

I thought they called for 100hr intervals. It should do 50hrs just fine.

 

[mobilaltima]

yes they do call for 100 hr intervals, I forgot to mention they are also run in very dusty conditions, along with the constant full throttle running.

 

[FCD]

If the oil you sre using is blue that means it's VR1 Synthetic, a bit fancy don'tyou think for a Kohler engine.

 

[toneydoc]

Have run it before in a Harley air cooled engine and it performed well.
And I am sure I ran it way more than 50 hours.

 

[ShotGun429]

Great oil, you have made a great choice, I use it also

 

[Lyman]

I ran it for 5k in a Harley no problem.