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<blockquote data-quote="Shadowrider" data-source="post: 3101330" data-attributes="member: 3099">You can thank the EPA for that.&nbsp; The ZDDP degrades catalytic converters over time to where they can&#039;t meet the .govs mandated warranty requirements.&nbsp; And if you run that much spring you better have an old school oil or you can kiss that cam and lifter set goodbye no matter how you break them in.&nbsp; I run Amsoil but in one of these engines I&#039;d have to use their Z Rod oil which is specifically for old school engines.&nbsp; It has the ZDDP needed. FWIW, the science in the new oils is getting pretty ridiculous.&nbsp; Look up low speed pre-ignition or LSPI.&nbsp; It only applies to the new direct injected and turbo&#039;d engines.&nbsp; The fix is in the engine oil (additives) and they are very hard on them.&nbsp; The manufacturers are going down to 0W15 pretty soon and 0W10 after that.&nbsp; There are already 0W10 racing oils out there.&nbsp; Like I said it&#039;s getting kinda nuts...</blockquote>

[QUOTE="Shadowrider, post: 3101330, member: 3099"] You can thank the EPA for that. The ZDDP degrades catalytic converters over time to where they can't meet the .govs mandated warranty requirements. And if you run that much spring you better have an old school oil or you can kiss that cam and lifter set goodbye no matter how you break them in. I run Amsoil but in one of these engines I'd have to use their Z Rod oil which is specifically for old school engines. It has the ZDDP needed. FWIW, the science in the new oils is getting pretty ridiculous. Look up low speed pre-ignition or LSPI. It only applies to the new direct injected and turbo'd engines. The fix is in the engine oil (additives) and they are very hard on them. The manufacturers are going down to 0W15 pretty soon and 0W10 after that. There are already 0W10 racing oils out there. Like I said it's getting kinda nuts... [/QUOTE]

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