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View Poll Results: Do you pre-fill your spin-on oil-filter
Never pre-fill 79 53.38%
Pre-fill from large outlet center hole 58 39.19%
Pre-fill with small funnel on one of the perimeter inlet holes. 3 2.03%
Leave it to whoever services my car. 8 5.41%
Voters: 148. You may not vote on this poll

 
 
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Old 27-01-2018, 01:11 AM   #1
aussiblue
FG XR6 Ute & Sedan
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Join Date: Oct 2006
Location: Bibra Lake WA
Posts: 22,697
Technical Contributor: For members who share their technical expertise. - Issue reason: Has been floating around the oze tech section for a long time and is always there to give advice when people have an issue. 
Default Do you pre-fill your oil filter and, if so, are we doing it right?

While this video (https://www.youtube.com/watch?v=P6MLDH0zTpw&t=187s ) about Cat Diesel oil and petrol filters, the principles are the same for the oil filters on our petrol driven vehicles and it does raise some interesting questions. If we are filling via the large spin on hole on filter we are filling at the outlet side and are probably doing very little in terms of priming the oil pump or oil lines. Also if there is a foil cap on the oil pack, or anything else in the oil that shouldn't be, it's going to go into the engine without being filtered. Even if we keep filling the filters at the outlet hole as the level subsides it is probably just being soaked up by the filter media in a sponge like fashion rather than passing to the filter inlet side. So do we pre-fill and if so should we be doing it with a small funnel one of small perimeter inlet holes?
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