My mom has had a 2012 chevy cruze 1.4L Turbo LT 6 years and she bought pre-owned at 25k miles.
Recently found out she has been using conventional oil for the last 40k miles since then and has had it done ever 3k miles at the locate Walmart.
Reminder her to look at the manual to show she needed synthetic oil. I don't know much about cars, how messed up will the engine be?
Is there anything I can do to help remedy the situation? Should I put in synthetic now or wait until the next oil change maintenance?
She said it will be fine but im not convinced.
This is what has been done on the car as far as I know:
-Air filter/ Cabin Filter
-Water Inlet/Thermostat (coolant leak)
-Engine Coolant Flush
-2 Upper Coolant Line Hoses
-Water Pump Recall
-Negative Terminal Line Recall
-Conventional Oil every 3,000 Miles