Redex!!
Whoo hoow !!
Wow are they still around?
I remember back in the 50's when all good Dads knew how to fix cars, and so did a lot of women too !
Our finest generation.!
During a fill up usually something Vauxhall, like model 14 ,Wyvern, Velox, etc it got a shot from a bloke holding an oversized squirt can with a plunger on it.
My dad swore it made the car run better , but my Mah always thought it was waste of hard earned money !
GM's Made in USA ,Canada as GMC and all Luton stuff he could fettle it, even his work truck was ex Army wartime GMC .
I worked with my dad in his shop as an 8 year old, and I knew somewhere there was kid on the other side of the pond that had worked with his dad with the same in say Cleveland or St Louis who had done & said the something!
The "F bomb" and an Oldsmobile to go with it

This clip proves it !
Tuercas viejas