The zinc being removed for the oil back 12 or so years ago was part of a big push to rid the streets of these older cars. Just like the "Cash for Clunkers" programs most all states pushed to encourage people to trade them in so they could be destroyed and not put back on the road. Now the gas being alcohol based is just another step to make it harder for older engines to survive the advancing technology that is biased towards the computer age cars. Products like these oils will only get higher as fewer and fewer of the cars needing those products keep disappearing. They know what products to target to cripple older engines, first it was the oil and now the gas. It wouldn't take many more changes to disable the older engines for good. What will happen when manufacturers quite making bearings and simple rebuild parts because the demand is so low as a result of the costs required to find the oils and gas needed to run them.
