Please forgive me for what I am about to say. I know the car calls for 5W30. I have had changes with Mobil 1 Synthetic Extended 5W30 at 1,500-9,000-16,000-and 23,000 miles respectively.
I accidentally bought 5W20 and changed the oil today, using about 5.5 quarts. I noticed about an hour ago that I used 5W20. Should I drain and fill with 5W30 or what?
Why does Ford recommend 5w20 for us in the Middle East??
The weather here is almost always hot, it doesn't make sense..
Might be the reason #4 ringland broke in my car.
Here is my recent sample using Mobil One 5w20. For reference, samples from left to right are as follows: Mobil One 5w20, Mobil One 0w40 and Motorcraft Synthetic 5w30. Currently running Mobil One 0w30, will have that report sometime in October.
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