Valvoline 300K guarantee? Cover sludge?
 

So go check this out---read the fine print section--that part is crucial.
Will this warranty cover our 1.8T engines from sludge related blowup?
or
Will they say its an admitted problem by Audi?

http://www.engineguarantee.com/

They will defiately say its audi's fault. No way will an oil company pony up the dough to replace an engine that audi already has a TSB for.