once we put gtx2 into a 4k that wasn't running right, it blew so much smoke we couldn't see the end of the street. we dropped it, put pennzoil in and there was barely a puff of blue coming out the exhaust pipe. oils ain't oils
personally, i wouldn't do a burnout on gtx2, it's just so rubbish. i've heard gtx1 is nowhere near as bad
and yes, i recommend pennzoil. the oil fields that it comes from are considered some of the purest in the world, and some of the best mechanics i know swear by it
like i said above, pennzoil "older engine oil". it's a straight sae60 specially designed for engines that are half f@$ked and on the way out, like your valve stems are. pennzoil hd-50 would also be a good choice, it's a heavy duty sae50. hope this link works
http://www.pennzoil.com.au/?method=product...226A2B9E6F59547