To provide long efficient work for 3.8 motor in Wrangler buy Synthetic 5w30 oil. In 2001 the company Jeep used to install 2.5 engine in its cars. You should use 6.6 liters of motor oil for Wrangler service. Having model code S01 this engine should be filled up with Semi Synthetic 5w30 type of oil. Use normal quality products to oil Jeep Wrangler motor.
Don’t miss what your 3.8 engine really needs and save your Jeep in good condition be servicing it. It’s very important that 1999 Jeep Wrangler receives great level of regular service. Good quality Synthetic 5w30 oil in amount of 6.6 liters will save your engine.