On Tue, 15 Dec 2020 12:46:35 +0000, R D S wrote:

On 15/12/2020 10:59, T i m wrote:

If it does, then there would be a finite time that an engine would
need to stop for before it actually made it cleaner

I looked into this once, I can't remember exactly but it was a
surprisingly short length of time.

Yeah, I guess if an engine was up to temperature and fuel injected and
'designed' to be started quickly, then I can see how it might be.

It would be interesting to know what actual time that was though.

Cheers, T i m