I got thinking. Sludge is currently a major and expensive problem for VW, Saab and Toyota, among others. If there are products that can really desludge and engine, without taking it apart, why hasn't any of these companies endorsed them?
I know there is a inbred bias against "snake oils", but several of them have recently started recommending, or even supplying, Barsleak as an alternative to replacing head gaskets, so you'd think they'd be delighted to find a sludge remover.
I know there is a inbred bias against "snake oils", but several of them have recently started recommending, or even supplying, Barsleak as an alternative to replacing head gaskets, so you'd think they'd be delighted to find a sludge remover.