well it seems its the zrs turn to play funny buggers,last week or so,on startup has been running on 3 cylinders,for about 30 sec,runs fine,but ive noticed that its drank nearly 2 tanks of coolant,it sounded like something was shorting out in the engine bay,whilst running,on first check for codes i got po304 misfire on cylinder 4,over the weekend i have had a gradual mayo on dipstick and under the cap,kel drove it today for 5 miles,and sayed engine management light was flashing twice,went out checked codes and got po303,po313,misfire on cylinder 3,misfire with low fuel detected,this is all i need after the zs giving up the ghost,rant over lol