Mobil1 5w30 engine oil could be to thin for your car or viscous, especially if you drive a modern vehicle like a direct injection engine. Always check with the manufacturer or the owner manual. Often some manufacturers recommend using a chart depending on the climate or environment you live in. what is the best engine oil, There are many factors such as increased wear from driving habits. Protection from oil can be improved if you have a direct injection engine then you dont want to use a thick oil that the manufacturer doesn't suggest. Also noack volatility is a important factor. Mobil1 extended performance 5w30 is a great oil but make sure this falls into the manufacturer's recommendations. Mobil1 vs supertech oil is another video where I test and review motor oil. zinc or zddp can be very important however due to the catalytic converter you must follow manufacturer's recommendations because Zddp can be harmful to the catalytic converter. Amsoil signature series 5w30 or Mobil1 annual protection full synthetic engine oil again thats a video I performed testing. Thin engine oil can damage the engine if its not the proper viscosity from the manufacturer of your car or vehicle. Liqui moly engine oil, Pennzoil ultra platinum or motul specific motor oil are good options. All oils with the manufacturer specifications and certifications can be used if your manufacturer says its safe. valvoline advanced full synthetic oil is a great quality oil for winter cold temperatures or summer hot temperatures. #mechanic