Has anyone documented carbon build up on intake valves of a stock ZL1 LT4?
I would assume the risk is very low especially with use of a dexos or mobil 1 oil that meets ilsac gf-6.
These were interesting to read:
https://www.corvetteforum.com/forums...jection-2.html
see post 233 here:
https://www.stingrayforums.com/threa....12271/page-12