Kawasaki, 38.5 HP

Whoa.

OP, you just bought my dream mower!

I’ve heard multiple people say that Scag’s Velocity deck has the best cut in the business.

Jealous!!

I’m running Mobil 1 15W-50 in my Kawi FR651V, and I think it would work well in your engine as well, but I think in such a high-end machine, I might spend the $$$ to run a synthetic V-Twin motorcycle oil like Mobil 1 V-Twin 20W-50:

https://www.mobil.com/en/lubricants/for-personal-vehicles/products/mobil-1-motorcycle-oils-filters

Question: I’m not familiar with the “XL”. Haven’t heard of that one. What’s the difference between this and the V-Ride II?

That is one high-performance cutting machine! Love it!
 
OP this is what I run in my mower. Current price is $44 for 5 what’s but it can occasionally be found on sale for $37ish. https://www.vanguardpower.com/na/en_us/support/vanguard-oil.html
IMG_3577.webp
 
So based on the manual posted, anything from 10w-40 to 20w-50 will be great.

With a 2 quart fill, I'd run whatever synthetic or synth-blend hits your price point and let 'er rip. As with most/all OPE, keeping it full and changed is far more important than what its filled with.
 
That's why.
No its not. My Ferris IS700 ZTR does 10MPH, has a 61" deck and probably weighs 2 or 300 more pounds than this and has a 28HP engine.
My Wright stander is older(2000 model) and is a 36" deck and it only has a 17HP motor.

Just seems like it would be inefficient for a business that operates it 10+ hours a day.
 
No its not. My Ferris IS700 ZTR does 10MPH, has a 61" deck and probably weighs 2 or 300 more pounds than this and has a 28HP engine.
My Wright stander is older(2000 model) and is a 36" deck and it only has a 17HP motor.

Just seems like it would be inefficient for a business that operates it 10+ hours a day.
Yes, seems like it's gonna drink quite a bit of gasoline. My workplace 54 inch Exmark has done fine for 14 years with a 21hp Kawasaki, and I cut "hay" with it on occasion.
 
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I know that's a huge mowing investment, but, in reality, you could use anything from regular motor oil to HDEO in weights of anything 15 up to 50 and everything in between. Me, I'm as ocd as most on BITOG, and I would use syn 15w40 or 15w50. Mobil 1 looks good.
 
I had an older V-Ride, 2017 maybe? Great mower, it did smoke a little on startup sometimes but didn't really burn oil per se. That's a great platform to really get some work done quickly. I used it in a mowing business I used to own. 38 HP, wow! I think mine was 24 or 26?
 
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