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2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs. |
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Not all trucks have the fans click on at 190. Most people see 195 but I know that Jack's truck runs at 205 regularly. Slightly warmer temperatures will help combustion efficiency but oil starts breaking down around 250. I would not try increasing the temperature above 210.
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