Do You Pre Fill Your Oil Filter?

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1,527
Location
Mid-West, USA
My Honda is a bottom mounted oil filter and the Subaru is a top mounted oil filter. I do not pre fill my oil filters, ever. I have never had an issue, never heard increased noise upon initial startup after an oil change. But, I am thinking, am I doing real harm by not pre filling? How would you pre fill the Subaru without leaking oil? What are your thoughts on pre filling the oil filter with new oil during your oil change?
 

Bud_One

Site Donor 2021
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2,112
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Spring,Texas
I Pre-fill every filter. I don't like the thought of the engine being without oil, for even a second or two.
 
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985
Location
MA
I pre-fill because I can. The few seconds without oil, and at low loads, probably isn't doing any damage but my thoughts are "why not."
 
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14,505
Location
Top of Virginia
I do it. The amount of time of "not having oil" is measured in fractions of a second...the oil pressure light goes off immediately after the engine start, just like usual...but why not, right?
 
Messages
385
Location
PA
I'll put some oil in the filter, but not full. Maybe 1/2 to 3/4 depending on the limbo the filter needs to do to get into place without spillage.
 
Messages
79
Location
Tennessee
I never did for years and had no problems. I started prefiling lately because of a vehicle specific problem that can come back at a later date and bite you. On bottom mount like my Corvette or wife's Jeep, I fill up 3/4, on Honda side mount I put in enough to soak filter media and a little more. On my Porsche 951, Porsche thought it best to mount the filter top mount so you get oil all over the exhaust getting it off. I already have a Big mess so I just do my best to keep as much as possible in the filter until it on.
 

Cooper

Thread starter
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1,527
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Mid-West, USA

BlueOvalFitter

Site Donor 2021
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Cajun Country, La.
Originally Posted By: Bud_One
I Pre-fill every filter. I don't like the thought of the engine being without oil, for even a second or two.
+1. thumbsup Some people find it a waste of time to do so. It makes me sleep better at night. I also get a warm fuzzy feeling all over. grin
 
Messages
12,925
Location
Northern Kentucky
I prefill when possible. If it's a spin on filter and it will hold oil while screwing it on I will put this amount in it without intentionally trying to fill it up to the point that it leaks on installation. Cellulose media probably benefits greater from the soaking than synthetic but since it doesn't hurt anything and we want the best, why not?
 
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