I would appreciate some of your thoughts...I have a 2003 2.7 V6 done 12500 kilometres and at present I am using Pennzoil "Full" synthetic 10w/30 with no problems or oil usage. However I have read here that some you guys in USA would like to get your hands on Castrol Magnatec 10w/40 with UMA [unique molecular attraction]. It is available everywhere downunder in New Zealand and my question is...given the choice would you stay with Pennzoil or switch to Magnatec semi-synthetic???..The main reason I use synthetic oil is because the Hyundai V6 engine revs to about 1600 rpm on cold start-up...The difference in cost is minimal....Thanks...Rugbykiwi