wvmarle:
What does this mean?Well, first of all that you're most likely not in the US
That's a very American expression.
YMMV = Your Mileage May Vary. Commonly used in automotive advertisements where fuel economy claims were made. Nowadays often used as "it could be a different situation/circumstance/... for you". In this case: different safety regulations.
Thanks. Is it used commonly in engineering or is it colloquial?
Regards