2013 Toyota Highlander Owners Manual - Page 826
2013 Toyota Highlander Manual
Page 826 highlights
4-3. Do-it-yourself maintenance Engine coolant The coolant level is satisfactory if it is between the "FULL" and "LOW" lines on the reservoir when the engine is cold. Reservoir cap "FULL" "LOW" If the level is on or below the "LOW" line, add coolant up to the "FULL" line. 512
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