I will point out this 'gem'. This is ZDDPlus's own words:
"The standards are not intended to infer any degree of backwards compatibility with older or specialty engines."
They said that the API and ASTM tests ARE NOT DESIGNED FOR BACKWARDS compatibility with older motors.
The API CLEARLY says this:
www.api.org/oil-and-natural-gas-overview/fuels-and-refining/engine-oil/~/media/Files/Oil-and-Natural-Gas/Engine%20Oil/MOTOR_OIL_GUIDE_2010_120210.ashx
"For automotive gasoline engines, the latest ILSAC standard or API Service Category includes the performance properties of each earlier category and can be used to service older engines where earlier category oils were recommended"
Yet we are supposed to ignore THAT and believe ZDDPlus's other claims????
Really??
Last edited by pfarber; 10/04/2014 3:55 AM.
