I have always been a dino oil guy, and never bought into all of the hoopla about synthectic. Well I have made the move to systhetic. I just put 5qt of Quaker State Q-Hp in my wifes Honda Element. It has 33k On it now and I bought since new I did 3-5k OCI with dino. I have a new Nissan Frontier V6 I want to go synthetic with it too but only have 800 miles on it. Is it to soon top go synthetic @ 1k? I was thinking about first, using up my Castrol GTX (I have 6qts left over from my old truck). If that is the case I will drop my factory will @ 1k and then GTX for 4k and then do Quaker State Q-HP synthetic. With this plan I will go synthetic @5k. I plan on keep BOTH cars synthetic for the rest of the life of the cars. I bought enough Quaker State Q-HP and WIX filters to do 4 oil changes for each car. We drive @ 7k each a year so this oil will last along time (a few years most likely) I hope this is good stuff, since it will be exclusively ran in our engines for some time to come. Im sure its a group III. At $18 for 5qt at Wally World plus $10 rebate I couldnt pass it up. (I have rebates being mailed to 7 addresses lol $70!) I'll have to lose that 8th rebate. I have always had great luck with dino but Im hoping synthetic will be that much better. Especially in the -20 degree winters. I'd like to see you BITOG'ers weigh in.