I have a 2002 Jeep Liberty with a 3.7 L engine. 130000 kms on it. Been using Mobl 1 5w30 oil since new. At around 100000 kms started noticing oil consumption, no leaks. About 1 litre every 1300 kms. Last oil change I switched to Mobil 1 10w30. No difference. Any suggestions to what oil i can use?