went to the local j.d./toro dealer today. I took the hydro filter from lazer z and had them cross it over to their filter. It crossed to the toro filter and then he punched the toro # into J.D. computer and it came up as a kohler engine oil filter in a j.d. box. does this sound right? Is the hydro filter the same as the engine filter on the 25 kohler. When I got home I compared the engine filters I have (vo-25 valvoline) and spun it on and it did fit correctly.