On Mon, 08 Jun 2015 08:48:47 +0100, CB wrote:

Castrol-R

Poseurs used to add it to their petrol.

Only in two-strokes, where not adding oil (of whatever flavour) to the
petrol rapidly led to disaster.

No. In four stokes also (bit like adding a shot of RedeX). Only
problem was that it never gave the proper racing smell unless the engine
was really thrashed hard. (High speed and high load - just revving it in
the car park never worked)

You ever tried adding oil to a four-stroke's tank? Even just a bit of
left-over two-smoke mix...?

It _really_ doesn't work very well AT ALL.