I just mixed synthetic and natural oil together, and 15w40 with

Congrats you now have 12.5W-40 SYN-POWA blend

>>17840213
>2017
>not mixing your own oil grade yet

Nothing will happen in the short term. You may discover leaks after years of use with thinner mixtures.

>>17840143
>short term
Nothing. You are fine
>long term

Just expect a few leaks and some burnt oil. Replace oil a little bit sooner.

If in a turbo, specially custom turbo, be VERY careful.

>>17840143
nothing, synthetic and conventional is required to be safe to mix by regulation

It can cause an earthquake.

>>17840143
>What's the worst that can happen?
The fact that your car is enough of a beater for you to do this.

your mother will die in her sleep tonight, unless you replace the transmission now.

>>17840415
Fuck, better get to work i guess, she was a good tranny too. Yes I'm talking about my mother you sick fuck.

>>17840213
>2017
>not having average oil grades yet

>>17840143
accelerated wear