Synthetic oil with E.O.S.?

[T Spool]

Anybody run zinc additives with synthetic oil?

Are there any negatives to adding E.O.S. or STP to synthetic oil?

 

[86 TR]

I run mobil 1 with a bottle of EOS every oil change. There is no problem with doing this. It just adds more extreme press. additives that flat tappet cams need to survive.

Ive been doing this for years on my car.

 

[Gary Wells]

I have just started running GM EOS with Mobil1.
Interesting read here:
No more GM EOS: - t6p.com - Turbo Buick Regal Resource

 

[T Spool]

Thanks guys. I have also been running Mobil 1 on my 80K stock block with no issues, but I will start supplementing with EOS to be safe.