Have any of you guys used an oil additive to stop oil leaks? I was also wondering if that kind of additive is harmful to our engines.

 

i used one once on my 2.8 that was garaunteed to pass emissions. well i passed emissions but it was by default. not because the oil additive worked

 

I've personally never had luck with any additives for fluid leaks, the only one that did work once (temporarily) was radiator stop leak. Usually, on LT1s anyway, when something starts to leak, its inevitable that its...gonnna leak...These engine are slimey little buggers, atleast mine is.

 

doont suggest additives
the best thing for any engine is a high quality oil

 

well put!