Dear Tom and Ray: Is it safe to add a few capfuls of denatured alcohol to the crankcase of my two older vehicles to remove oil sludge before I change the oil? — Lorilee RAY: Is it safe? Well, I don’t ...

Yours truly has a neutral opinion regarding engine flushes: I believe engine flushes are only necessary when the engine has sludge buildup. Sludge is a dark and thick substance from contaminated oil, ...

Bioleaching processes have been demonstrated to be effective technologies in removing heavy metals from wastewater sludge, but long hydraulic retention times are typically required to operate these ...

The chelating agent trisodium nitrilotriacetate (NTA) can be used effectively in combination with polyphosphates in the formulation of heavy-duty detergents. Laboratory investigations have shown that ...