What we think?
The crutch is that the oil has to be replaced every 3,000 miles.
Guarantee only covers oil wetted engine components.
Sounds like a lot of hassle.
Whats the odds of an oil wetted engine component failure.
Then the additional cost of oil changes.
Oil changes must be recorded on line, and recipts kept.
Then if there is a failure, who knows if valvoline will keep their word.
You have no recourse if they don't.
Link to site.
http://www.engineguarantee.com/view_terms
Dan