So today I was bored at work (like most days) and found myself browsing DIY maintenance and reading a lot about coolant. I never knew it was so particular to have only Toyota OEM coolant (newb, i know). However, the last 2 oil changes I got were done at a Quick Lube place and each time they said my coolant was a little low and asked if I wanted it topped off. Not knowing any better, I said sure because I though coolant was pretty much universal.
Now, having read all the coolant threads, I am really worried about having a non-OEM type coolant mixed in with my original Taco juice. Should I immediately drain/flush my coolant and refill with stuff from the dealership?
I am coming up on my 90k service and will be doing it all myself (thanks to the wealth of info on here) and will continue to do maintenance myself from now on. All-in-all, my final question is: can I wait until my 90k service (about 2k more miles) or should I drain/flush my coolant ASAP?
thanks in advance