[FLYGEEZER]

The dilution amount ( time) was based on the outside temp anticipated. All "recip" oil as best as I can remember was SAE 50. The dilution process was the last thing to do before engine shutdown and was done at idle power. In the morning.. if the engines started..the gasoline in the oil would burn off or evaporate above 40 C. Engines were run at low power 1200-1500 RPM until the oil quantity indicator dropped to the shutdown quantity the night before and then topped off with fresh oil. The process took about a half an hour or so.The last recip I flew was the C124 & had 4 28 cylinder engines with a dry sump capacity of 100 gallons each. Oil dilution took a long time but had to be done if ya wanted to get the thing running in the AM. Ah yes!!! Those were the days. Wooden ships & iron men! Wern't any girly men on the crews back in the day.