So it's definitely time to change the coolant in my 1980 Buick. Problem: Stores all stock "universal coolant"...no more choice of green or DexCool, now it's one size fits all. I found what I think is old-fashioned green stuff at a parts store but it was fabulously expensive. Is this universal stuff truly harmless or do I need to pay a premium price for what should be old-fashioned cheap stuff?
The green stuff was made out of Ethylene Glycol, buy the cheapest stuff, its all the same chemical. This new stuff, I dunno. When ever I change fluid, I always add a can of "Water Pump Lubricant, Anti Rust," Its essentially machine oil, that lubricates the waterpump seal and keeps rust from forming. Hope it helps.