The Ford Barn

flatheadmurre · 08-15-2017, 12:13 AM

Lowering phosfor and ZDDP caused by polutioncontrol and lifespan for catalytic converters will continue...
ZDDP was introduced as a bearing material protection since going from pure babbit bearings to harder less chemical stable alloys needed a surface antioxidant and corrosion inhibitor.
For older engines that is parked for long periods the newer oils with more detergent and less corrosion protection to be able to meet cleanleness is another issue.
I said it before...Phosfor and ZDDP is the best additive for engine oil invented and the only reason it is taken away is polution control...when it drops under 900ppm any engine start getting issues...not only in the valvetrain but corrosion and bearing material oxidation.
Modern oil is not dictated by performance needs...it´s goverment polution control setting standards...and a modern car expected life is 7 years.

08-15-2017, 12:13 AM	#29
flatheadmurre Senior Member Join Date: Apr 2015 Location: Sweden Posts: 3,045	Re: Best oil for an 8ba Lowering phosfor and ZDDP caused by polutioncontrol and lifespan for catalytic converters will continue... ZDDP was introduced as a bearing material protection since going from pure babbit bearings to harder less chemical stable alloys needed a surface antioxidant and corrosion inhibitor. For older engines that is parked for long periods the newer oils with more detergent and less corrosion protection to be able to meet cleanleness is another issue. I said it before...Phosfor and ZDDP is the best additive for engine oil invented and the only reason it is taken away is polution control...when it drops under 900ppm any engine start getting issues...not only in the valvetrain but corrosion and bearing material oxidation. Modern oil is not dictated by performance needs...it´s goverment polution control setting standards...and a modern car expected life is 7 years.