07navi
Full Access Members
I change mine every 3 years and thoroughly flush entire system by running engine flush and water for a week beforehand and try to run the heaters (hot in summer). I use the straight green stuff I get from garage sales for pennies on the dollar (50-50 in system). I have a system of fully removing the old stuff I will do a writ-up with pictures this summer depending on how nice everyone is.So ... in your opinion ... coolant change goes by miles ONLY and NOT years?
How many years would you go before changing coolant?