Not wishing to argue as you know more about them than me I'm sure, BUT, the one that I regularly ignore flashes me sometimes, and not others when I expect it to flash (If you know what I mean).
I have actually tested it by driving through it over and over again to see if it would, and it simply...
As far as I know mate, that's accurate.
If they are put into 'mimick' mode then thy will flash either direction. If they have film in then they will only flash for speeders going the correct direction of travel.
The Type 24 Gatsos can only take images from the rear, and since the cost of the...
Best way to test this is to hook it round and bury it back though the camera going to opposite way (If it's a Gatso - and on a single carridgeway road). If it flashes, there is no film in it. If not, ******.
I've used various oil additives over the years, including millers.
Always did what I was hoping it would, usually dulling noise, or piece of mind. Slick 50 was always my personal favourite. Expensive though.
What is your goal for using it? Engine protection?