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mike100 · 03-27-2017

I blended a couple quarts of the z-rod Amsoil with the jug of mobil1 from walmart. The z-rod is a little concentrated on the zddp additive-way more than ohc tappets need. You can duplicate 1990's mobil1 additive specs by using 2-3 qts of the zrod and the rest modern mobil1.

so then a 12 qt box of the Amsoil will last 4-6 oil changes. You get increased protection, but without overdoing it so much that it costs too much or fouls the catalysts.

03-27-2017	#17
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: ZF fluid change time! I blended a couple quarts of the z-rod Amsoil with the jug of mobil1 from walmart. The z-rod is a little concentrated on the zddp additive-way more than ohc tappets need. You can duplicate 1990's mobil1 additive specs by using 2-3 qts of the zrod and the rest modern mobil1. so then a 12 qt box of the Amsoil will last 4-6 oil changes. You get increased protection, but without overdoing it so much that it costs too much or fouls the catalysts.