I just did my first oil change at 2800 miles. In my other cars I usually prefill the oil filter to minimize the time it takes to build oil pressure. In my Nissan 300Z I build oil pressure first before starting up the car by pulling the fuel pump fuse and turning over the engine with the starter. The 300Z has an actual guage.
On my Tacoma I did the same thing. I pulled the fuel pump relay in the fuse box and turn over the engine. It took 10 seconds on the starter for the oil light to go out. I only did it 5 seconds at at time so I wouldn't over heat the starter.
Wow, I've never have prefilled my oil filters in any of my cars. Any time your car sits over niight and when you start it up it's pretty much the same thing, right. I heard of people installing an oil primer that primes the engine with oil before you start it which seems more practical. Just my 2 cents.
I've never prefilled either. I believe that changing your oil while the engine is still warm will ensure that there is still a fresh coating of oil through out the engine from being recently run.
To each his own. I'm just glad there is someone else out there who thinks about these things. At least when my wife call's me crazy, I can point that the computer and say "look... crazy people who think a-like".
__________________ 2008 Tundra Crewmax Limited 4X4 TRD 5.7 Blue Streak
2007 4Runner Limited 4X4 V8 Salsa Red Pearl
Wow, I've never have prefilled my oil filters in any of my cars. Any time your car sits over niight and when you start it up it's pretty much the same thing, right. I heard of people installing an oil primer that primes the engine with oil before you start it which seems more practical. Just my 2 cents.
Overnight is not the same as not prefilling.
First, the antidrainback valve in the filter (which works to varying degrees in various qualities of filters) prevents much of the oil from draining out. Secondly, prefilling a new filter saturates the filter media and displaces air. That means it's that much sooner that oil displaces air thruout the system and the pressure comes up.
I ALWAYS prefill the filter, and use that a measuring stick as to the quality of the shop that I check out. Also (noted in earlier strings) the fact that the filter is port side down on the Taco does not adversely affect the prefill. Just soak the media really well (fill 1/2 way thru center port, and rotate the filter around to completely soak the media. Flip it over and screw it down. You'll be surprised at how little oil actually escapes (but what does drip out of the filter merely flows into the mounting bracket port and into the sump).
On my Tacoma I did the same thing. I pulled the fuel pump relay in the fuse box and turn over the engine. It took 10 seconds on the starter for the oil light to go out. I only did it 5 seconds at at time so I wouldn't over heat the starter.
I had a copy of my key made (without the chip). Now I can do the same thing without pulling the fuse. Since the key copy does not have the chip that enables the truck to start, it just cranks.
I use this because I travel a lot... After the truck sits for several weeks, I like to get the oil pressure up before it starts. These newfangled trucks start way too easily.
It takes approx 15 minutes of normal driving to get your oil temp up to sufficient temp to adequately pump through all ports in your engine and provide complete protection. This is where 90% of engine wear occurs. Oil temp and engine temp are two completetly different animals. Your engine depends on residual oil that clings to the engine parts at cold starts. If my oil did not provide adequate lubrication in the 10 seconds it took to fill the filter & build pressure after an oil change.....I would switch oils (to Amsoil or Royal Purple), sleep better and save my starter.
It takes approx 15 minutes of normal driving to get your oil temp up to sufficient temp to adequately pump through all ports in your engine and provide complete protection. This is where 90% of engine wear occurs. Oil temp and engine temp are two completetly different animals. Your engine depends on residual oil that clings to the engine parts at cold starts. If my oil did not provide adequate lubrication in the 10 seconds it took to fill the filter & build pressure after an oil change.....I would switch oils (to Amsoil or Royal Purple), sleep better and save my starter.
Why would oil brand affect how long it takes to build oil pressure? My truck was hot and the temperature outside is 110 degrees. I am using 5w30 Chevron Supreme API SM.
Overnight is not the same as not prefilling.
First, the antidrainback valve in the filter (which works to varying degrees in various qualities of filters) prevents much of the oil from draining out. Secondly, prefilling a new filter saturates the filter media and displaces air. That means it's that much sooner that oil displaces air thruout the system and the pressure comes up.
I ALWAYS prefill the filter, and use that a measuring stick as to the quality of the shop that I check out. Also (noted in earlier strings) the fact that the filter is port side down on the Taco does not adversely affect the prefill. Just soak the media really well (fill 1/2 way thru center port, and rotate the filter around to completely soak the media. Flip it over and screw it down. You'll be surprised at how little oil actually escapes (but what does drip out of the filter merely flows into the mounting bracket port and into the sump).
I have no doubt that prefilling the oil filter is good for the reasons that you have mention but comparing an oil change to each time you start up the car does more damage to the engine. My point was that the one time changing the oil kinda seems a waste of time, for me that is.
I have no doubt that prefilling the oil filter is good for the reasons that you have mention but comparing an oil change to each time you start up the car does more damage to the engine. My point was that the one time changing the oil kinda seems a waste of time, for me that is.
Each time you start up the car the oil lines and filter are already primed. On a new filter, there is air in the system.
I have no doubt that prefilling the oil filter is good for the reasons that you have mention but comparing an oil change to each time you start up the car does more damage to the engine. My point was that the one time changing the oil kinda seems a waste of time, for me that is.
Obviously, many people change oil without prefilling and are not suffering disastrous damage.
It's a balance of what effort it takes vs. reducing wear. It IS so easy. You've got fresh oil to fill the sump, this merely means that, after draining and replacing the plug, you open the oil container, prefill the filter (all of about 10 seconds), pour the balance in the sump, install the filter, finish filling the crankcase. For me, it's very little effort for whatever aid it provides over the next 20 or 30 oilchanges.
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