I actually bought a can of BG 44K last year but left it on the shelf for some reason - I think I read it was a bit harsh. I ran some techron through the fuel tank and I only every use the Shell Nitro+ fuel.
I will try BG44K before the next big drive. Am I right in thinking it's best to do an oil change after use?
Yes they do recommend changing the oil after running the BG 44K. I personally sometimes do if I am close to an oil change but if I am not close for an oil change, I don't bother changing it.