Good afternoon. I see a lot of post for oil filters for mahendra tractors. I have some great news! O Rilly's has came to the rescue. They have several in stock.
Wix oil filter: 51381
Fram: DG 3950 and MGL 3950
These filters are for the 3510-4x4 w/3A165C-DYI ENGINE.
Price: average price $3.50 US
Beats the dealer cost @ $15. US ea.
Best of luck