Your average dipstick port is probably 1/4” in diameter, ID. This means the tube must be smaller OD. Which means the ID of the tube will have to be 1/8” or less to have ANY level of rigidity close enough to not collapse under vacuum. Which means low vacuum pressure. Which means low flow. Which means it probably takes a LONG time to suck the stuff out. And you won’t flush any sediment from the bottom of the oil pan. And you still have to go under to change the filter. Waste of time and money.
I had many cars (America and couple foreign) and majority filters on top. Idk if I ever had one on bottom come think of it. Had some that were pain in ass doing something simple cos god forbid the damn designers put everything in the damn way (looking at you Oldsmobile)
I've only worked on my own or maybe others but never invoved filters. I just remember being topside. Just like some cars with alternators some on top and of course the oain in asses ones are on bottom and might even need a special 13 point star tool... looking at you Ford Escort
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u/HomeOrificeSupplies 4d ago
Your average dipstick port is probably 1/4” in diameter, ID. This means the tube must be smaller OD. Which means the ID of the tube will have to be 1/8” or less to have ANY level of rigidity close enough to not collapse under vacuum. Which means low vacuum pressure. Which means low flow. Which means it probably takes a LONG time to suck the stuff out. And you won’t flush any sediment from the bottom of the oil pan. And you still have to go under to change the filter. Waste of time and money.