[skyholic]

just about to do an oilchange from 10w50 fuchs to 15w50 motul and was thinking if i should bother draining the cooler (thermostatic grex relocation kit) and lines ?
normally i wouldnt, but now that i am changing brands it got me worried

 

[freakazoid3]

I would...

 

[Dan ep3 turbo]

I never used to bother all oils mix but eat t stick to 1 oil then saves the worry

 

[DINGER B]

I went to 15w50 mogul in my 33,and had no problems.... But as for the coolant I'd drain in.

 

[D-Ranged]

I didn't when i swapped oil weights and didnt have any issues. i drained mine while i had the car apart thought.