Both meet A3 spec and both have same Phosphorus 1000 ppm and Zinc 1100 ppm levels. Which would you use and why? I have a 94 Mercedes-Benz with M119 4.2 V8 with 95k miles. Just did the cam oilers and the inside of the valve covers were clean as a whistle and there was no scaring at all on the valvetrain. Previous oils used were diesel 15W-40 CI-4 rated oils with higher Phosphorus and Zinc levels than the now available CJ-4 emission rated diesel oils. I am located in Sunny hot Florida and travel 12k a year mixed driving. Thanks in advance for input.