Thread: Royal purple?
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Old 10-11-2010, 06:12 PM   #8 (permalink)
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One engine builder I know was happy with it; specifically with the power it made and the lack of wear metals in the oil. Other oils in the same engine made less power (slightly), and/or showed lots of wear metals from specific parts. (The engines he was testing do have an unusual cam/lifter arrangement, though.)

Other folks I have talked to have called it "purple sludge in a can", and advised me to throw it as far away from my car as I could.

Hard to tell who to believe, but I think the first person wasn't that concerned with sludge buildup and the long term. It is also very possible that the different batches that they were using had different properties.

I don't think I'll be trying it, myself...

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