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Old 03-06-2012, 02:03 PM   #1
Bpatts
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Default Revving engine after oil change?

Car: 2005 WRX sedan
Mileage: 92722

I decided to switch from penzoil to Valvoline High Mileage 5w30 engine oil. I took it to a place down the road that is an independent oil change place and NOT a Jiffy Lube or anything like that.

Took the car in and they changed the oil. As soon as they changed it, he told me to start the car and then rev it a couple times to circulate the oil.

Revving the engine right after an oil change? Am I missing something or is that a big no no? I didn't rev the engine, just let the idle shoot up to 1500k then drop back down to 750.
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Old 03-06-2012, 03:49 PM   #2
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Revving an engine is never a good idear untill it is up to operationg temp. I always start the car up while watching the oil light and let it idle normally.
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Old 03-06-2012, 06:01 PM   #3
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And that's what I did. Car was already up to operating temp. I didn't rev and the oil light went out a few seconds after I started the engine.
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Old 03-06-2012, 06:58 PM   #4
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So... Mitsubishi fsm actually tell u to do this right after you put in the oil before you measure with the dip stick.
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Old 03-07-2012, 01:06 AM   #5
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Uhh, I do my own oil changes, and after pouring in the correct amount of oil, i wait 3-5 minutes to let the oil settle, check the dipstick (sanity check), start the engine and idle for 30 seconds, turn the engine off, recheck the dipstick and add more oil if needed. No revving the motor immediately after startup. That does not sound like a good idea to me at all.
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Old 03-07-2012, 10:23 AM   #6
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Anyone that is changing your oil is the lowest grade and lowest experience technician there is. Never listen to them. 99% of them have no clue.
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Old 03-07-2012, 12:45 PM   #7
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You were right not to rev the motor. If your oil light comes on the filter probably didn't have oil in it before it was installed. Your motor will be happier if the filter is pre-loaded with oil and you crank it for a few seconds after an oil change. The idea is to get oil circulating BEFORE it runs. Low revs without oil > high revs without oil

I'm not scared of Jiffy Lube oil changes under my supervision. Just walk into their shop and talk cars with the techs. They'll listen to you if you 'remind' them to do little things to your car. Hell, I've even poured oil into my own filter to lube the o-ring and pre-load the filter when the kid didn't get it. If the tech is an F-tard then I'll tell him straight to get the hell away from my car
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Old 03-07-2012, 11:55 PM   #8
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Quote:
Originally Posted by imma_stocker
You were right not to rev the motor. If your oil light comes on the filter probably didn't have oil in it before it was installed. Your motor will be happier if the filter is pre-loaded with oil and you crank it for a few seconds after an oil change. The idea is to get oil circulating BEFORE it runs. Low revs without oil > high revs without oil

I'm not scared of Jiffy Lube oil changes under my supervision. Just walk into their shop and talk cars with the techs. They'll listen to you if you 'remind' them to do little things to your car. Hell, I've even poured oil into my own filter to lube the o-ring and pre-load the filter when the kid didn't get it. If the tech is an F-tard then I'll tell him straight to get the hell away from my car
+1. I forgot to mention to pre load the filter with oil and lubricate the filter o ring with oil before installing. I doubt dealer or indy shop techs bother to do this.
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Old 03-08-2012, 09:45 AM   #9
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Originally Posted by furiouswrx View Post
+1. I forgot to mention to pre load the filter with oil and lubricate the filter o ring with oil before installing. I doubt dealer or indy shop techs bother to do this.
Although pre-filling the filter doesn't hurt, it certainly isn't a required step either. LOTS of engines have designs that point the filter downwards. No way you are going to pre-fill that filter, and those engines have lives that can outlast a subaru engine fairly easily.
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Old 03-08-2012, 10:33 AM   #10
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Originally Posted by rkramer View Post
Although pre-filling the filter doesn't hurt, it certainly isn't a required step either. LOTS of engines have designs that point the filter downwards. No way you are going to pre-fill that filter, and those engines have lives that can outlast a subaru engine fairly easily.
Required, no. Beneficial, yes. Lots of variables go into oiling systems but oil in the filter before the motor cranks over is a good thing. Even if you're just getting the filter element wet and letting the bubbles float out before installing it.
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Old 03-08-2012, 08:46 PM   #11
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I'm curious. What would be the reasoning behind the suggested revving. Why would you need to circulate the oil? Once the oil pressure warning light goes out everything is the way it should be.
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Old 03-08-2012, 09:33 PM   #12
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I'm curious. What would be the reasoning behind the suggested revving. Why would you need to circulate the oil? Once the oil pressure warning light goes out everything is the way it should be.
Oil change dude's flawed logic.

Maybe he's thinking that the additives in the oil will form a layer and protect the engine more quickly. In fact, it takes hundreds of miles for that to happen. That's all I can come up with. Revving a turbo with cold oil is the absolute worse thing you can do.

-Dennis
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Old 03-09-2012, 01:15 PM   #13
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Quote:
Originally Posted by ciper View Post
I'm curious. What would be the reasoning behind the suggested revving. Why would you need to circulate the oil? Once the oil pressure warning light goes out everything is the way it should be.
Common idiotic logic is to get the pump primed faster (fewer seconds). These are the guys playing checkers in a chess game.

In their minds: Rev the engine, spin the oil pump, oil pressure light turns off
In reality: Rev the engine, turning your engine dry, little to no lubrication over your bearings and cylinder walls, excessive wear for no reason but impatience, oil pressure light turns off
The right way: Get your pump primed as much as possible BEFORE REVVING THE ENGINE, let it idle until oil is saturated again, wet bearings, wet walls, wet valvetrain, pressure is good, flow is good, happy motor, rev away
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Old 03-09-2012, 01:27 PM   #14
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i recommend u do your own oil changes or have someone u know and trust do them. type of oil is important as well as the filter depending how long u run them between changes. oil is the life of the engine and just like imma_stocker said everything wet everything happy
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Old 03-09-2012, 10:15 PM   #15
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You only rev it it up to like 1500(if your idle doesnt do it automatically)...every time i've been to the oil change place they say to do it...even when they do it they only do it to like 1500-2000 they just want to see that the oil pressure has come back up.
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Old 03-10-2012, 08:07 AM   #16
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Really? Thats one more reason I can use to convince people not to go to those places.
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Old 03-11-2012, 03:49 PM   #17
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Change the oil and just start it up and let the car idle that will just do fine.... NOT rev it when just minutes ago you poured new oil in the engine, some mechanics are insane !!
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Old 03-11-2012, 07:54 PM   #18
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stupid people......the idiot that changed the oil just wanted to see it blow up
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Old 03-11-2012, 10:33 PM   #19
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To the OP,

The best way to get the oil circulating in the engine is simply starting it up and letting it idle like other people here have said. There's no science to this, just simple procedure.

A correction to a few people who said something about starting the engine up, letting it idle for 30 secs then turning it off and rechecking the oil and then adding some is a little off. Letting it idle for 30 secs or 1 min sends oil all over in the engine so when you go to check it the level will be slightly lower than what it would normally be if you had checked the oil after letting it sit for 10 plus minutes giving time for the oil that got spread around to drain back into the pan.

Since our cars take around 4.2 quarts of oil, I put in 4 quarts and then drive it that day. I check the oil the next morning or before I drive it again therefore giving me a more accurate reading of the oil on the dipstick. Doing it this way has worked great for me everytime!

Why did you go for the higher mileage oil? Do you not understand the importance of the proper oil in a turbo engine...??
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Old 03-11-2012, 10:35 PM   #20
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Quote:
Originally Posted by SubaruWRXtreme View Post
Change the oil and just start it up and let the car idle that will just do fine.... NOT rev it when just minutes ago you poured new oil in the engine, some mechanics are insane !!
They are insane.... Letting it simply idle will circulate the oil and at idle there is low load so nothing to worry about...
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Old 03-11-2012, 10:53 PM   #21
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Quote:
Originally Posted by subi400 View Post
To the OP,

The best way to get the oil circulating in the engine is simply starting it up and letting it idle like other people here have said. There's no science to this, just simple procedure.

A correction to a few people who said something about starting the engine up, letting it idle for 30 secs then turning it off and rechecking the oil and then adding some is a little off. Letting it idle for 30 secs or 1 min sends oil all over in the engine so when you go to check it the level will be slightly lower than what it would normally be if you had checked the oil after letting it sit for 10 plus minutes giving time for the oil that got spread around to drain back into the pan.

Since our cars take around 4.2 quarts of oil, I put in 4 quarts and then drive it that day. I check the oil the next morning or before I drive it again therefore giving me a more accurate reading of the oil on the dipstick. Doing it this way has worked great for me everytime!

Why did you go for the higher mileage oil? Do you not understand the importance of the proper oil in a turbo engine...??
you operate under a misconception

'our engines' take several different amounts of oil

and some of the amounts are quoted as being amount with and some without changing the filter in the owners manual.....the fsm usually lists both amounts

it is a bad thing to just ASSume...so dont

I have been buying 5 qt of oil and filling the filter and installing it and then pouring the remainder of the 5 qt in my car since day one...actually both my wrx's.....and never had any issue at all
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Old 03-11-2012, 11:18 PM   #22
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Quote:
Originally Posted by subi400

Why did you go for the higher mileage oil? Do you not understand the importance of the proper oil in a turbo engine...??
Is there something wrong with high mileage oil? I switched to Valvoline synthetic blend because my car has 92000 miles on it and others have had good uoa with them.

Am I missing something? High mileage oil is bad for turbos?
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Old 03-12-2012, 07:47 AM   #23
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Quote:
Originally Posted by Bpatts
Is there something wrong with high mileage oil?
Am I missing something?
High mileage oil is bad for turbos?
No.
No.
No.
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Old 03-12-2012, 07:53 AM   #24
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Originally Posted by Bpatts View Post
Is there something wrong with high mileage oil? I switched to Valvoline synthetic blend because my car has 92000 miles on it and others have had good uoa with them.

Am I missing something? High mileage oil is bad for turbos?
yeah...just dont use the 5w30 in it
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Old 03-12-2012, 03:11 PM   #25
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Quote:
Originally Posted by Uncle Scotty View Post
you operate under a misconception

'our engines' take several different amounts of oil

and some of the amounts are quoted as being amount with and some without changing the filter in the owners manual.....the fsm usually lists both amounts

it is a bad thing to just ASSume...so dont

I have been buying 5 qt of oil and filling the filter and installing it and then pouring the remainder of the 5 qt in my car since day one...actually both my wrx's.....and never had any issue at all
Then, I guess I need to read some of the newer owner manuals then because the one for my car says 4.2 US quarts But then again if you add oil to the oil filter then it comes out about 5 quarts so yes you are right about that part.
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