Hi, only posting things I know for a FACT. Got tired of the LS dealers trying to rip me off ($375 +labor for the first 50 hr service).
2015 LS XR4046H
Engine- Tier 4 compliant Shibaura 4 cylinder engine
I changed engine oil and filter. Used Fram PH3614 ($3.77 at auto parts store, it's a 3/4"-16 thread, industry standard 21 micron filtration, almost exactly same dimentions as the original LS filter)
I used 5w40 Mobile 1 diesel synthetic oil for year-round compatibility, it took 1.5 gal., Walmart had the best price of $29/gal.
NOTE: there are two drain plugs, one on each side of the front drive line.
HST(hydra-static unit)
It takes a very popular hydraulic filter Wix 51551 ($9.89) my husky log splitter takes the same one. ( 1"-12 thread, 10 micron filtration)
NOTE: i've seem someone posted Wix 51553, do not use that one because it is 33 micron filtration, you need 10.
Hydraulic filter (the big one)
It takes Wix 51715 ($50.39, 40x2.0 metric thread, 10 micron filtration)
NOTE: that one leaks a lot of hydaulic fluid out during the change so have everything close by, I lost about a gallon. And by the way I used AW 46 oil, you do not have to buy LS hydraulic oil, manual recommends either 46 or 68 depending on average temperature.
I'm still working on a fuel pre-filter, so far no luck finding the exact match.
Attaching pictures...
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