I would suggest sticking with one synthetic and recommend Valvoline SynPower 5w30. Valvoline has a great reputation and great oils. Be sure you use a upper tier oil filter (stay away from Fram), such as Purolator PureOne, Bosch, Wix or Napa Gold.
Note: If you go on the Valvoline website, they have a great offer with a $20 mail-in rebate. Check it out!
Walmart usually has the the best prices for Valvoline in 5 qt. jugs.
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2003 Ford Focus SE (2.3L) / 82K
Valvoline MaxLife Synthetic 5w30
Purolator PureOne filter / PL10241
Chevron Techron every six months.
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Opinions are like asses...everyone has one...but some stink.