This WEBSITE has the answers as well as pictures and a step by step: http://theswampbbs.com/300m/plugchange/default.html
You need to multiply 300m by 100cm since there are 100cm in a meter. You should be able to solve that mentally.
Oil change is due.
when do you change spark plugs
each spark plug has own coil must remove coil first to get to plug
You should change the oil every 3 months of 3000 miles.
To change the spark plugs in a 1997 astro van do I have to change the spark plugs from the bottom of the engine/
Generally I change platinum plugs at 100K and regular plugs at 50K.
Carefully remove the lens then bulb
5 to 5.5 quarts
4.5 quarts
300m is 0.3 km.