I have a mazda rx8 was getting an oil change they noticed a milky substance on dipstick what could it be

I would change and keep a close check on it....got to be water but from were.. Did it ever run hot?

No never ran hot running normal just my check engine light came on

On thanksgiving I cranked it and accidently turned off without letting it heat up worried that's why engine light came on I have a rotary engine 6speed

Unsure, wish I could be more help.......

The milky substanse like mayonese is oil mixed with water from the coolant system. Not good sign... From some where is leaking coolant liquid to the engine... Look also for the same milky stuff at the coolant cap...

My New Mazda R-X 8 got into water and now is not starting, Waiting for the help before taking to any workshop .