How low did the coolant get? How observant is your wife?After learning to wrench on the LCs, I’ve begun paying more attention to my wife’s daily driver (‘15 Highlander) and doing things myself. The coolant was leaking, so I investigated and figured out it was the t-stat housing gasket. No problem…ordered the parts from Toyota and went ahead and threw in new radiator hoses as well. Topped off coolant and kept an eye on it until the parts arrived. Got the parts in, knocked out the replacements in about an hour. Refilled the coolant and…it was full of oil. FML. I don’t see this costing me less than a couple suspension kits for the 80s. They will be on the road one day, just not today unfortunately.