Why was your oil pressure so low to begin with? Or are you talking about your dad's old Tacoma? If you're talking about the X, I would've been more concerned to find out what was causing the problem than just dumping something in to "fix" it.

Personally, I'm very skeptical of additives although I admit I'm not familiar with this one. I had an '88 Trooper before with oil pressure problems. One mechanic's
"solution" was STP oil treatment, which as I now understand it, is basically just 50 weight oil. Of course that "increased" the oil pressure. Till the front seal gave out.

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