Mixing the
oil as you describe is a very bad idea, The two oils do not congeal to form a 10W40, what happens is one half acts like a 10W30 and half acts like a 20W50. This came from both Mobil and Valvoline. I would stop this practice sooner than later.
Quote:
Originally Posted by patrickt
I run Brad Penn in my FE. Half 10w-30 and half 20w-50 and a bottle of EOS. From time to time the subject of zinc & phosphorus (especially with solid flat tappet cams) comes up. Here are the numbers from my most recent oil analysis:
Zinc - 1748
Phosphorus - 1368 |