Spark Plug 3.7L Durango?
I got a 2005 Dodge Durango with 120,000 miles 3.7L engine . I thinking of doing a tune up changing the spark plug . My question is what spark plug is best for this engine Champion ? Another question why when I remove the transmission oil dipstick is very hard to put it back with out putting up with a fight ? I new to this Durango any information will help thank ..
Engine oil Dipstick have a really dark brown stain is this normal ? thank