motorcraft 5w20?
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motorcraft 5w20?
ok i have a 2003 f150 4.2 v6 i have used 5w 20 motorcraft since i bought it becouse the owners manuel recomends it. but i have olways used valvoline 10 w30 in everything else will it hurt to use the 10 w30 in the truck or could it hurt to keep using the 5 w20?
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Joined: Aug 2003
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From: South Texas
there's nothing wrong with the motorcraft 5-20, its a semi-synthetic oil and you can get it for about $1.50/qt. I'm not really sure if its true, but I've heard that changing to a higher weight oil will decrease the MPG slightly.
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From: Iowa
Originally Posted by aztec12
i have used 5w20 and didnt like it!!!!!!!!!! for me its 5w30 winter 10w30 during the rest of the year in my 4.6 f150
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