2006 Jeep Grand Cherokee — 3.7L

From the factory this vehicle uses a BCI 94R · 730 CCA battery, OE oil filter 04781452BF. Note the factory cabin air filter is now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

This engine holds 5 qt w/ filter of 5W-30 API engine oil, 80W-90 · GL-5 · SYNTHETIC in the differential, DOT 3 brake fluid. Torque lug nuts to 95 ft-lbs, the oil drain plug to 25.0 ft-lbs. The firing order is 1-8-4-3-6-5-7-2. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.

Under the factory schedule, replace the engine oil and filter every 6,000 mi; spark plugs every 30,000 mi; coolant every 100,000 mi. The big-interval services (every 100,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.