355 Pennzoil Platinum Euro no longer for Ferrari?

I think it depends where you get it from regarding the label. Seems in Europe it has the logo I suspect. I noticed that too. But the oil is the same still, so in it goes.

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What is the difference between, say, Valvoline and Pennzoil in full synth 5w-40 European spec? One is $4.71/quart, the other is $10/quart.

 

I realized after posting that I was surely opening a can of worms to ask about oil....then I read through a couple of threads here. I'm gonna go with Amsoil 10-40. All too familiar with ZDDP issues since I have two air-cooled 911's and the Amsoil has the right levels of the good stuff.

Does Pennzoil have a spec sheet on their 5-40?

 

Yes there is a spec sheet on their site.

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I searched quite extensively and found nothing. There is spec sheet but it doesn't list ZDDP.

 

Pennzoil Platinum Euro 5w40 has 979 and 823 Z and P.

Someone on bitog did analysis to get that if I recall, had it in notes from years ago.

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IMHO this is pretty insufficient for the 355's valvetrain design. Just because Ferrari recommends an oil doesn't mean the formulation is appropriate. Porsche used to recommend M1 oils for air-cooled engines that had way lower ZDDP than needed. People should make this decision based on spec sheets, not factory recommendations on engines they haven't been responsible for in 20+ years.

 

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Mobil 1 15W-50 has been used regularly in my Challenge car. I've never experienced any foaming.

 

If you want zddp then you want amsoil zrod. It has 1440. Yey, an oil thread.

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It's not that I want zddp. It's that I don't want cam lobe pitting.

 

I am switching to zrod next cycle.

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It's interesting that we haven't seen (to my knowledge) cam lobe pitting on 355's. I suspect it's because so few of our cars get driven enough to rack up miles. In the air-cooled 911 world this was a genuinely significant problem for several years before word got out about the right oils to use. I wonder if it's just the lack of miles put on 355's or if it's something like less spring pressure (but that doesn't make sense to me -- you'd think 355's would have more spring pressure given the higher redline). Hydraulic lifters shouldn't matter, as 993 cams suffered just as much from low-ZDDP oil as earlier 911's w/ solid rockers.

 

F355 valves are a hell of a lot smaller and lighter than 993 valves. Thus it wouldn't surprise me if spring pressure followed suit.