In KingFisher ONE (which was "underused"), i would notice white deposits inside the fuel lines.
I cut lengthwise to check and found them to be "waxy" in consistency.
Perhaps "fell out of solution" from fuel onto walls?
I use KingFisher TWO more and have not noticed any yet.
Older cars and their gaskets are rumoured to be in line for damage, but a bit like "millennium bug",
which wasn't a bug nor a "threat" but caused us all much concern---
Props best to suck and see?I believe "underuse" to be FAR more damaging, but ATM we are a little limited!
"SOON"--
-- (As my late parents used to placate me with----)