Oily standards

It's a question of how much oil is being burnt. Too much will foul the converter and inhibit its ability to turn harmful emissions from the engine into largely harmless gases emitted into the atmosphere. Excessive oil in the exhaust gases will affect the converter, but Holden assures us those engines that do show high oil consumption -- and Holden says these are few and far between -- don't consume enough to be a problem in terms of converter operation.