Timestamps 4:48 How to Prevent High Cost Semi Truck Repairs 4:55 Oil Changes 5:13 Different types of Oil 5:53 Why oil type matters 6:13 How to check the quality of your oil 6:45 Identifying if the oil is mixed with water, coolant or fuel 7:00 Rising Oil Level 7:58 Metal shavings in oil 8:19 Sending oil sample to a lab 8:37 Why oil samples are helpful