[Aredubjay]

Smoke on start up could be caused by a seeping injector.

As for Beav's recommendation, he recommended Rislone.

The blue smoke is oil burning. On more conventional engines it's usually caused by oil running down the valve stems and entering the cylinders. When started the first few strokes will burn off the oil and create the blue smoke. On the H-6 I'm tempted to believe that the oil is coming from the piston rings instead of the valves, due to engine layout.

Is the oil level a bit overfull? Do you 'gun' the engine a bit before turning the key off? Either will cause the smoke. If those items are o.k. you might post to Chris Debban's garage and see if he knows of a common Suby problem that causes this. If there isn't a common problem then I would recommend using an 'engine flush' before changing the oil the next few changes. Sometimes the oil rings in the pistons will cake up and not do their job properly. The oil flush will normally remove the residue and allow them to again work properly. Marvel Hi-Rev, Rislone, etc. are examples of engine flushes. Follow their instructions implicitly.

Beav

Edit: The injector problem would be characterized by WHITE smoke, whereas, as indicated above, the oil problem would be characterized by BLUE smoke.