quote: Originally posted by buster: I called Havoline and they said next month they are rolling out a 5w-20 Synthetic Oil. FYI. The 5w-20 GF-4 oil currently, is a group II.
But in reality is a Group III going to be that much better than their current Group II conventional oil for probably 2 to 3 times as much? Or are they bringing out a 100% true synthetic oil? Even then if you don't change your oil every 10,000 miles will their "synthetic" oil really be better? After all their dino seems to produce great results in 5,000+ mile range. Perhaps it's due to a great additive package to help the Group II base oil. I use to be a 100% synthetic fan but with the advent of the new and "improved" dino and dino blend oils I'm now a serious user of Motorcraft 5W-20 in my 2002 F-150 w/the 4.6 and my wife's 2005 Explorer w/the 4.6. We go to around 5,000 miles guilt free oil changes. used oil analysis indicate this is more than adequate for the type of driving being done.
The current 5w-20 SM Havoline is a great oil. Flash point is somehow 460F. The specs on their synthetics look great also. 496F and 5% Noak for the 10w30.
I'm not a 5W-20 convert yet. I like a little more protection please. Even a 5w30 will give you a little more wear-time when oil contamination from fuel or antifreeze happens to creep in... sometimes comes in slowly - sometimes fast & overnight.
The blended or 'dino' 5w20's like Havoline and Motorcraft have shown such good results here that I personally don't see the need for a much more expensive Full Synthetic 5w20. Extended drains would be the exception.