Quote:
Originally Posted by Flavor 987S
Mainly because I just switched oils. Went from Mobil 5W50 to Joe Gibbs DT40 5W40.
I am just curious how much old oil is still in the system.
To compare, I've heard on my 993 Turbo, that when we do an oil change there, we only get out about 10 quarts. There are several quarts of old oil that remain in the system.
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Completely different system, the 993 is a dry sump design which retains a lot of oil in the lines, cooler etc. Box is a wet sump that retains very little. When I do an oil change, I use about 9-1/2 quarts on refill after about a 1/2 hour drain when completely hot. 9-1/2 is what the manual specs.