Extralube ZX1 concern!

[Jcerb]

I found an invoice for Extralube Zx1 with the history when looking through all the reciepts with the last oil change! I remember reading up on this stuff that it contains chlorinated parafin which can corrode copper and bronze!! If the valve guides are copper or bronze which i have a very strong feeling they are what to do? Flush and change the oil? etc. Thanks

[scotty_d]

They are more than likely made from Phosphor Bronze. but if your cornered drop the oil for it all it cost and i am sure if it corrodes you valve guides it will cost a lot more than to change the oil.