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One car done and a few more to go... My wife's SUV takes 0w20 but Mobil has two types... Extended Performance and Advanced Fuel Economy. I have the Advanced on my Lexus (0w20) and have not seen any improvement on mileage. Can someone help me with the difference between these two flavors on...

I did the oil change today using Mobil 1 0W40. Did the Italian Tune up yesterday and the car is running perfectly. Very quiet at idle and not a single ping or anything else. Just the light purr of the engine. Thanks to everyone for the advice and could not be happier!

Does anyone go beyond 1 year on a synthetic oil change? For one of my cars, I am putting very low miles (less than 5k miles in a year) on it.

I am going to try and change my oil myself for the first time. Rather than spending $225, I can do it for less than $100. My question is which oil to use. Now I know there are tons of data in here and read a good chunk of it. However, the confusion is based on the Porsche specs says 10w40 and...