I've just hit my 500 mile break in and I'm ready to change my oil. This is a new chevy 350/265 with a flat tappet cam and I know the oil should had ZDDP, but that's all I know. should I just keep using engine breakin oil, or is there an popular addative that I can just pour in? I'm hoping its something common I can get a pep-boys. I see that summit has oil with ZDDP that is not listed as 'break in' so I was thinking to just order that, doesn't seem expensive compared to other oils. Thanks in advance for your input.
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