Top Off w/ 5W-30?

[TPadden]

Idling down a steep slope isn't a "foaming" scenario. High rpm is required for foaming. Also, most high quality motor oils have anti-foaming constituents. Especially those intended for high performance vehicles like Porsche, Corvette, etc..

Most modern high performance vehicles (Porche/ C8 Corvette etc.) have dry sump oil systems with separate oil reservoir and scavange pumps to reduce the amount of splash and foam/windage from the oil system. , Wrangler's are wet sump. That is a whole other discussion...

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[roaniecowpony]

Most modern high performance vehicles (Porche/ C8 Corvette etc.) have dry sump oil systems with separate oil reservoir and scavange pumps to reduce the amount of splash and foam/windage from the oil system. , Wrangler's are wet sump. That is a whole other discussion...

A dry sump is a big help in reducing windage, but doesn't eliminate foaming. One of my first recollections of foaming was on a dyno run with a dry sump engine. Immediately after the run, the oil tank was opened and was full of foam. I believe the scavenge pump had a lot to do with creating the foam.

 

[TPadden]

I have to bow to your experience, perhaps something wrong with the scavage pump.. Most things I've read say "A dry-sump system minimizes oil aeration, and also de-aerates oil far more effectively by pumping it first into a remote reservoir."

Tom

 

[roaniecowpony]

I have to bow to your experience, perhaps something wrong with the scavage pump.. Most things I've read say "A dry-sump system minimizes oil aeration, and also de-aerates oil far more effectively by pumping it first into a remote reservoir."

Tom

That is true. It does remove aeration in the tank. But the nature of how a scavenging pump sucks oil and air out of the bottom of the pan is a foam generating system. So, anti-foaming agents are still very important.

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