There is nothing wrong with switching back and forth between synthetic and regular oil, as the two are compatible with each other.

What are the symptoms of thick engine oil?

If engine oil is too thick, it won't properly lubricate the moving parts of your engine, so you might experience trouble starting your car (particularly on a cold day).

36:{"Manufacturer":"Mazda","VehicleId":"51264","BHP":"115","BodyStyle":"Medium MPV","Derivative":"TS2","Doors":"5 Doors","DriveType":"Front","EngineSizeDescription":"1.8 litres","FromYear":"2005","Fuel":"Petrol","FuelDelivery":"Injection","Gears":"5 Gears","Model":"5","ToYear":"2010","TransmissionType":"Manual","Valves":"16 Valves","VehicleType":"Car"} 37:{"Manufacturer":"Mazda","VehicleId":"141460","BHP":"150","BodyStyle":"Medium MPV","Derivative":"Sport Venture","Doors":"5 Doors","DriveType":"Front","EngineSizeDescription":"2.0 litres","FromYear":"2014","Fuel":"Petrol","FuelDelivery":"Injection","Gears":"6 Gears","Model":"5","ToYear":"0","TransmissionType":"Manual","Valves":"16 Valves","VehicleType":"Car"} 38:{"Manufacturer":"Mazda","VehicleId":"51266","BHP":"143","BodyStyle":"Medium MPV","Derivative":"Sport","Doors":"5 Doors","DriveType":"Front","EngineSizeDescription":"2.0 litres","FromYear":"2005","Fuel":"Diesel","FuelDelivery":"Turbo","Gears":"6 Gears","Model":"5","ToYear":"2007","TransmissionType":"Manual","Valves":"16 Valves","VehicleType":"Car"} 39:{"Manufacturer":"Mazda","VehicleId":"95164","BHP":"115","BodyStyle":"Medium MPV","Derivative":"Takara","Doors":"5 Doors","DriveType":"Front","EngineSizeDescription":"1.8 litres","FromYear":"2010","Fuel":"Petrol","FuelDelivery":"Injection","Gears":"5 Gears","Model":"5","ToYear":"2010","TransmissionType":"Manual","Valves":"16 Valves","VehicleType":"Car"} 3a:{"Manufacturer":"Mazda","VehicleId":"51265","BHP":"110","Bo

Mazda 5 Engine Oil

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