I've been using the topsider for oil changes in my '94 E500 for over 5 years, not evacuating the oil filter area. Pulls out 8 quarts +a tad more on occasion. I change oil in 1500 mile intervals using 15W40 Penzoil LongLife and have no noise at start up- OE oil filters.
Oil pressure behavior is same pre and post topsider use.
-fad
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