Originally Posted by Mr Gazza

I couldn't really comment as I was always more of a Gunk man and I haven't even used any of that for many tens of years.
If I remember correctly, you are supposed to run the engine up after rinsing, to warm it and dry it off. I think it must leave a residue as it will have the distinctive smell of Gunk for days.?

The thing with petrol is that there is always some around and you need very little indeed to clean stuff up spotless.
I used up some old two-stroke mix to clean things once and it had the advantage of leaving a very thin oily film behind... Not particularly good for your skin or lungs though!

I tend to use clutch and brake cleaner more these days, which will lift almost anything off and is safe on rubber and most paints. Trouble is that it evaporates so quickly that it just tends to move the crud along a bit! You have to wipe it immediately or use enough for it to run off with all the muck... Also not brilliant for your skin and lungs.