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Message: <blockquote data-quote="yellow tang" data-source="post: 1587872" data-attributes="member: 38472"><p>I have a excellent 2004 gt conv. 70k miles. now that I got top fixed ( line was leaking) I want to take 3 or 4 trips this summer to visit a friend. each trip will be about 250 miles or so total. no hard driving just interstate ( 70mph) and some in town driving. I heard the 4.6 was a great engine and is known to get high miliage. BUT ..I also read they blow plugs out of head? I'm almost afraid to take it on any trip. The tires are almost new..serpentine belt excellent..no lights on dash.. Am I pretty safe to go or is that plug blowout issue real common?  Thanks</p></blockquote><p></p>