'86 Mazda B2000, 212,5XX miles
Out: Prestone after who knows how many miles but about 6-7 years
In: Prestone Concentrate and distilled water
I'm actually in the process of flushing now. I dumped the original, filled with water and got to operating temperature, shut-down and dumped. Poured in Prestone Flush(sodium bicarbonate) and filled with water. Drove 4 miles roundtrip to circulate, shut-down for the night, got up this morning, drove to work(36 miles), dumped mostly water in grass and have now filled with distilled water. I will dump once more at home tonight and fill with the Prestone Concentrate and top off with distilled water.
The first dump was kinda of murky, but the subsequent flushes have been cleaner and cleaner. Now "clean" water dumps out. Gonna fill with Prestone now.
The truck will not be driven as much in the coming months with the company fleet vehicle coming to my garage. I wanted to set her up right for the hibernation. It also got fresh Amsoil GL-4 Manual Transmission Fluid yesterday and will get fresh Amsoil GL-5 Gear Oil tonight. The Rotella T6 5W40 went in just over 2 weeks ago, so I feel everything will be "better" to set on compared to what was in it.