Pre-fill OF

[Tman220]

I've prefilled a couple of times with vehicles that have allowed me to. For the most part I noticed no decrease in the amount of time the oil pressure gauge or light has indicated a lack of oil pressure so I chalked it up as a waste of time on any filter that doesn't require a ton of oil to actually fill.

Not to mention I'm in the rust belt, things tend to rust out before wearing out around here. Never had any engine issues and I've had a couple of my engines a part with no indication of bearing wear.

If splash lubes engines and lawn mowers can last 100's of hours and many thousands of miles while being splash lubed, the residual oil in the bearings can protect them for 2 seconds while the filter gets filled.

 

[ARCOgraphite]

I recommend pre-filling maybe only 1/2 to 3/4 - as you may have air in the drill to the pump, a big slug of oil in the filter acting as an impediment, then air in part or the drill to the mains or HLA.

Some engines have priming problems and a full oil canister won't help that situation, IMO.

I had a new Toyota Yaris not prime after it's first OC.

On our Subaru I carefully pour oil into the mount outlet and inlet as it uses an inverted spin-on filter on the top of the engine.
I don't know why I bother as the car dry starts after sitting for an hour or two - at least with the Fram made filters.

- Ken
(btw, the guy playing Ken in the movie is not Ken !!! fyi)

 

[SHOZ]

I always do. The worst was a Festiva with a horizontal mount on the back of the engine. Had to hold the filter just right and only prefill about 75% of it.

 

[ZeeOSix]

A great application to use AI for a summation of these results! A next step for BITOG.

Or people can just be their own 'AI" and use the search function, lol.

 

[Bellavita]

Or people can just be their own 'AI" and use the search function, lol.

You're right. Also when creating a new post, our site dynamically is returning titles of like subjects we've already covered as a community . . . another form of AI!

 

[Mewbs]

I usually pre-fill when using an oversize filter, however the small OEM sized ones usually don't pre-fill them since the oil pressure light goes off fast on them after filling new oil in the engine. Should make a it a habbit to pre-fill regardless since unfiltered new engine oil is always better than no oil to get the engine primed faster on start.

 

[Dave Hess]

100% of the time I always pre fill oil filters.

 

[Revving2Redline]

Used to take the empty bottles of Redline HP qts and hold them over the TG and FU oil filters to get the last couple teaspoon or two in them. Then cut a hole on the bottom of one bottle and have a homemade funnel.

 

[ATex7239]

I am a no pre fill and cold drain kind of guy. it appeals to my rebel nature and overwhelming desire to always stick it to the man.

 

[DGXR]

I prefill my oil filters because vertical/base up orientation. In years past, I insisted that the filter be absolutely full of oil but that became messy. Now I just say full enough is full enough

I also unplug the coils to prevent ignition on the first start cycle.

You'd be better off pulling the fuel pump fuse or trying the "flooded engine" routine.

Unplugging the injectors would accomplish the same thing. Pulling the fuel pump fuse would definitely be easier, but only if you already know which fuse that is LOL.

 

[vpr5703]

I prefill my oil filters because vertical/base up orientation. In years past, I insisted that the filter be absolutely full of oil but that became messy. Now I just say full enough is full enough



Unplugging the injectors would accomplish the same thing. Pulling the fuel pump fuse would definitely be easier, but only if you already know which fuse that is LOL.

The issue with unplugging the ignition is that the injectors are still firing so the oil is getting slightly diluted by the incoming fuel. I'd pull injectors, but they're under the intake manifold and...yeah that's more work than I am willing to do for an oil change. LOL

 

[JWC86]

I used to but I've stopped. I see no point in it.

 

[dubber09]

I used to prefill when was anal about this, not for at least last decade.
If you change oil on cold engine, just start and run it for a minute, then do the job.

 

[SHOZ]

I prefill my oil filters because vertical/base up orientation. In years past, I insisted that the filter be absolutely full of oil but that became messy. Now I just say full enough is full enough



Unplugging the injectors would accomplish the same thing. Pulling the fuel pump fuse would definitely be easier, but only if you already know which fuse that is LOL.

Unplugging the injectors is a major PITA on Hyundais with the double locking connectors.

I've done the dry crank before to build up oil pressure and IMHO you are doing more damage than if you just stated it. Wear and tear on the starter and 20-30 seconds of no oil pressure at all.

 

[OLEJOE]

Pre fill and don’t have to unplug, disable or anything else that might upset the computer system.

 

[Urshurak776]

I think about all the Jiffy Lubes and oil change shops out there. Do you think they pre-fill? I know the answer, no..........and most cars on the road gets their oil changed at these places.

So, unless the manufacturer says you have to, no reason to.

That being said, I have filled mine, but last couple of oil changes, haven't bothered.

 

[Tifosi]

 

[bullwinkle]

He’s doing it wrong-if you’re going to prefill, it should be through the OUTSIDE holes. Otherwise unfiltered (hew) oil is heading straight for the bearings…

 

[Twinturbski36]

Flood mode on ford f150 after oil changes. Crank for 5secomds then let go of gas petal and it starts… no need to fill.

 

[Tifosi]

He’s doing it wrong-if you’re going to prefill, it should be through the OUTSIDE holes. Otherwise unfiltered (hew) oil is heading straight for the bearings…

They addressed this in the video.