My little cruddy 1.4 16v has the lovely red coolant in it.
Before setting off to an interview (irrelevant info) my dad was topping stuff up (and yes it was my dad) and i shouted at him for putting blue coolant in where red was as i didnt thinkyou could mix them (thats 2 yrs working at motorworld talking which meants jack shit)
Cars run fine since and i've done 500miles.
Dad told me it'd be fine.. im just curious! but i was going to top up with red when i got to the petrol station but obv dad filled it first.
he thinks im not capable of checking oil and coolant on the mk4! hahah!