Are there cars that SmokeLess won work on?
There are a few series of cars in which SmokeLess gives limited success. One is the Mazda 4-cyl from about ’87 to ’92, which has a “stuck oil-ring” problem. In addition, the Mazda RX-7 rotary engine has limited success. The oil essentially cools the fuel mixture too much, resulting in incomplete fuel burn and some smoke. Other conditions to watch for include white steamy smoke can indicate a head gasket/coolant leak problem. Gray, fuel-smelling smoke can indicate an incomplete fuel-burn problem. FHS SmokeLess oil cannot help these conditions.
