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Got my stang b4 2 days and now its time to give it some routine maintenance. I know the difference between SAE 5W-20 and SAE 5W-30 but I just don't know which will give better performance as the Ford Manual recommends 5W-20 but somewhere I read that 5W-30 gives long engine life but a slightly reduced fuel economy. So from your experience which one should I use for my 03 'Stang GT.



Regards,
Hardik
 
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