zinc-free oil?

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23,591
Fuchs Titan GT1 has a zinc-free formula. It's environmentally friendlier and supposedly better for catalytic converters. Can zinc be omitted without sacrificing protection?
 

Al

Messages
19,200
Location
Elizabethtown, Pa
Sounds risky to me. ZDDP is a **** good additive it does a lot of good things. Mobils testing indicated that even 1500nppm really doesn't hurt cat converters. I'd steer clear of this stuff.
 
Messages
6,388
Location
Washington St.
The zinc phosphate compounds are effective anti-wear and anti-oxidant agents that cost little. There are other products that work well and cost more. If the phosphate gets into the catcon, it will damage it. If the oil has a lower volatility, less phosphate gets to the catcon, and the damage is negligible--until the engine is older and burning oil. Newest oil spec for late 2004 has a slight reduction in phosphate. Ken
 
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