Babbitt metal and PET

Hello, folks!
I was researching babbitt metals for use in bushing-bearings, and noticed that none advertised on materialweb were stronger or more resilient than PET
(polyethylene terphthalate).
PET has a higher elongation-to-break, higher tensile strength, higher compressive strength, lower coefficient of friction, and comparable stiffness compared to all babbitt metal formulations, and a melting temperature comparable to lead-based babbitt formulations (about 475degF).
PET is also fairly stable chemically, and does not degrade from contact with motor oil.
What am I missing? Is there any reason I should even consider babbitt metal when making or replacing a bushing bearing? PET seems better across the board.
Thanks much, -- TTK
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.