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Looking for input about the need to put zinc additive into the oil of a Slant6. Primarily people that have not and what experience they have had with engine problems, or those that have and can give me some suggestions on the best brand of oil/additive to support the need. Appreciate your...

Just had an engine rebuilt and was told I had to add a Zinc additive to the oil (permanently). This is due to the flat tappett design (so they say). This being my first slant I need to know if this is myth or fact. Appreciate the input.

Trying to simplify the vacuum requirements on my Duster. I have noted a bunch of CA equipment and other bits that I believe I could remove and still operate fine. Wanting to know if anyone else has done the same. Specifically, if I plan to ditch EGR and the charcoal canister, do I still...

I am a newbie with the slant and have been looking at the posts. Enlightening. If I want to upgrade my exhaust, do I truly need EGR? Cold weather operation is not my issue (Phoenix). Headers vs. Dutras? Appreciate the input.