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#16 |
Junior Member
Join Date: Jan 2006
Location: Ancaster ON Canada
Posts: 13
Likes: 3
Liked 6 Times in 6 Posts
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Hello; I heard that Shell has reduced or eliminated ZDDP from their formula (pressure from the EPA!) Rislone makes the best additive; contains both zinc & phosphorus. The STP additive is way too viscous & only contains zinc. We use synthetic oil in our stocker: 5w20 in spring/fall & 5w30 in the hot weather. (for what's it worth)
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