The oil filter is a screw on/off type. JD part# AM107423. The fuel filter is AM116304. Oil is TY22029. The fuel filter can be a pain to change as it lays in behind the rear wheel but can easily be changed with a pair of needle nose pliers to release and slide the hose clamps back. Buy 2 qts of oil. Add 1 qt after draining and add to the full mark. There should be a drain hose from engine with cap on end. Remove cap and drain oil.
The SRX is a nice lil rider. With a single 30 inch deck the cut is great.