For Those Who Don't Think a Catch Can is Needed on Gen 4 s...

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LokiWolf

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This^
Ford woukd rather u blow your engine and buy a whole new car. Dame thing eith Ford telling us to wait intil over 120,000 miles to change the original spark plugs. Ridiculous
Big difference between the 2 subjects. Spark plugs other than the metals a little haven't changed very much in 30 years. Tighter tolerances, higher temps, and turbo chargers are harder on the plugs. Oil on the other hand is better, especially the Semi Syns and Full Syns. Oil analysis has proven time, and time again, via SCIENCE that they can go longer. I typically go 5-6K, because I drive mine hard. 3K is overkill. It is not going to hurt anything, but if you are using at least the recommended Semi Syn, 3K is overkill.
 

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