How does the Wynns engine oil flush compare?
After a flush, should the drained oil contain any sludge? If there is no sludge, does this mean the engine was quite clean to begin with?
Any recommendations on the best product to remove varnish?
After a flush, should the drained oil contain any sludge? If there is no sludge, does this mean the engine was quite clean to begin with?
Any recommendations on the best product to remove varnish?