i have thick gooey in my radiator overflow
I took my car 97 camaro to get oil changed and they told me they recommended synthetic oil and then when done recommended i take it in for service. That my radiator overflow had some thick gooey stuff in it. They showed me on paper towel. I was wanting to know what your thoughts are and do u think that by flushing it and changing thermostat and putting new antifreeze in it would solve the problem or u think i should take in shop?