Running In - is it needed?

[MickAP]

I used to hand out the Castrol stickers when I worked at a filling station…

[Countryboy]

@JBCCDU

Oh yes ! But where I grew up, it was normally written on a piece of cardboard stuffed in the back window

They could afford new cars but not the “running in” stickers? Strange!

[JBCCDU]

Actually A head decoke/ top end rebuild, or a new ‘big end’ were so much more common than today … as was tin worm

[Countryboy]

Ahhh! That explains it! Thanks!