Oh no my favorite subject!

Two words spring to mind, wives and tales. Apologies to anyone I offend.

There was a problem in the 80's with Diesel engines known as bore polishing and it is well documented but I personally have never seen an engine that has been rum on synthetic oils that has experienced bore glazing.

Yes it is true that running in a new or re-bored engine on synthetics will slow down the process (it will not damage the engine) so mineral oils are preferable during this period but this whole issue is a mystery to me. Has anyone got any pics of bore glazing that they could email me?

I would love to see some and pass them by a major oil company for comment.

Cheers
Simon