Date registered: Sep 2007
Location: Fort Worth, TX
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Is this method as effective as draining through the sump plug?
My mechanic does this with a container that has a vacuum but I always felt it doesn't remove as much oil as draining from the sump would
I've always felt the same, however, since having an MB oil pan off the car, I can say that, fully drained when pretty warm, there is still
about 1/4-1/3 of a quart in the pan due to the way it is shaped. It was certainly this way on my 420 SEL's pan, and based on the color of the oil immediately after the first change on my E320, and looking at the pan itself, the same thing happens in this engine's sump.
I've since decided it'll be faster, easier, and I'll get to look at some items while doing it, to jack up the LR of the E320 so oil in the 'reserve' area can't hide from the plug drain. The drain on the 320's pan is at the right-front of the engine, so lifting the LR a decent amount will get it.
Plus, I'll not have a choice but to roll around and look at CV bellows and other stuff typically not noticed until it's past fixing the existing part(s).
'05 Cadillac STS, V8, pearl white, 137K miles, my DD
Wife's ride: '02 Lexus RX300 AWD, all the options but a hitch, 130K miles
'99 Fleetwood Bounder Diesel 39Z diesel pusher motorhome, which has visited 9 provinces, 1 territory, and 49 states under our ownership, 135K miles and many modifications
'98 Jeep Grand Cherokee 5.9L, dedicated 'toad' 165K miles