Looking to explore for new motor oil
10-05-2011 | 07:03 PM
#16
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Joined: Jan 2011
Posts: 1,279
From: CA
Car Info: "Shadow"
DO NOT use a thicker oil
The majority of wear occurs at start-up while the oiling system primes. The thicker the oil, the longer it takes to circulate.
Heavier oils are a holdover from the days of natural base racing oils when they needed a high viscosity to prevent thermal breakdown. True Synthetic oils have a much higher heat tolerance than any natural base racing oil
The majority of wear occurs at start-up while the oiling system primes. The thicker the oil, the longer it takes to circulate.
Heavier oils are a holdover from the days of natural base racing oils when they needed a high viscosity to prevent thermal breakdown. True Synthetic oils have a much higher heat tolerance than any natural base racing oil
10-05-2011 | 07:30 PM
#17
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Posts: 7,634
From: Campbell, CA
Car Info: Some sort of Subaru
^This, you think Subaru specifically says 5W-30 just for the hell of it. You think they'd lie so all they're cars get ****ed up, hell no, it is that weight & viscosity for a damn reason. They built the damn engines so they should know best right? It don't say 0W or 40 or 50 or so on, only 5W-30 people, quit acting like you miraculously know what oil is best that's far from the recommended one. Idk about y'all, but all i've ever used is 5W-30, always synthetic though, but different brands to test which one is best, & i've never had ANY problems whatsoever. Our motors are engineered with tight tolerances, not to thin or thick, so stick to the rightful numbers, remember oil is the lifeblood of any vehicle, to deviate is taking your chance imho.
10-05-2011 | 08:03 PM
#18
iClub Silver Vendor
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From: 631 Railroad Ave. Fairfield, CA
Car Info: A Laptop
^This, you think Subaru specifically says 5W-30 just for the hell of it. You think they'd lie so all they're cars get ****ed up, hell no, it is that weight & viscosity for a damn reason. They built the damn engines so they should know best right? It don't say 0W or 40 or 50 or so on, only 5W-30 people, quit acting like you miraculously know what oil is best that's far from the recommended one. Idk about y'all, but all i've ever used is 5W-30, always synthetic though, but different brands to test which one is best, & i've never had ANY problems whatsoever. Our motors are engineered with tight tolerances, not to thin or thick, so stick to the rightful numbers, remember oil is the lifeblood of any vehicle, to deviate is taking your chance imho.
-- Ed
10-05-2011 | 08:22 PM
#19
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Posts: 7,634
From: Campbell, CA
Car Info: Some sort of Subaru
Not to mention since most people have modified their engines, it's not the same conditions for the motor as before. There are also people that do motorsports. You'd want to use something different for both environments.
10-05-2011 | 08:30 PM
#20
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From: BorderJumperEnforcer's momma's house
Car Info: Fast
Wow, lots of fail here. I would go with the recommendations of Mike and Ed in addition to the owners Manual. As Ed stated, you can use a range of oils based on what temeratures the engine will see.
As far as startup wear, that is why you use a multigrade oil. The first number is the effective viscosity when oil is cold.
In my personal experience on a stage 2 STI engine with reasonable daily driving, Rotella and Red Line were the 2 best oils as far as wear protection and sheer resistance goes. Every oil change and oil brand change had an UOA which is what I based my conclusions off of. Euro Amsoil 5w40 sheered (probably not the same as Ed recommends), as did Mobile 1 5w30.
Again what it really comes down to is: How do you use the car, and what temperatures will it be operated at?
As far as startup wear, that is why you use a multigrade oil. The first number is the effective viscosity when oil is cold.
In my personal experience on a stage 2 STI engine with reasonable daily driving, Rotella and Red Line were the 2 best oils as far as wear protection and sheer resistance goes. Every oil change and oil brand change had an UOA which is what I based my conclusions off of. Euro Amsoil 5w40 sheered (probably not the same as Ed recommends), as did Mobile 1 5w30.
Again what it really comes down to is: How do you use the car, and what temperatures will it be operated at?
10-05-2011 | 08:56 PM
#24
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iTrader: (25)
Joined: Nov 2002
Posts: 15,494
From: Participating in some Anarchy!
Car Info: 2005 LGT wagon
LubroMoly...PentoSyn...Motul...Redline.
All are true ester based synthetic lubricants.
Have torn done engines run "only on Mobil/Castro/Rotella " and the varnish these oils leave behind tells me not to use the oil.
All are true ester based synthetic lubricants.
Have torn done engines run "only on Mobil/Castro/Rotella " and the varnish these oils leave behind tells me not to use the oil.
10-05-2011 | 09:17 PM
#26
Thread Starter
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Joined: Jul 2011
Posts: 3,334
From: San Jose, Ca
Car Info: '06 WRB STi
Wow there's some good info posted in here while I was gone 
I use my car as a daily driver but the places I drive are only a few miles apart so the engine sometimes doesn't get the completely warm-up it deserves. The average temperature here is from 50's to mid 70's (rarely) with 60% highway and 40% city.
Also how are you able to tell if the oil sheered? I was leaning towards Amsoil Euro 5w40 for the next fill-up (if that's what Ed was recommending).
Would you put Amsoil on that list of recommended oils?
Wow, lots of fail here. I would go with the recommendations of Mike and Ed in addition to the owners Manual. As Ed stated, you can use a range of oils based on what temeratures the engine will see.
As far as startup wear, that is why you use a multigrade oil. The first number is the effective viscosity when oil is cold.
In my personal experience on a stage 2 STI engine with reasonable daily driving, Rotella and Red Line were the 2 best oils as far as wear protection and sheer resistance goes. Every oil change and oil brand change had an UOA which is what I based my conclusions off of. Euro Amsoil 5w40 sheered (probably not the same as Ed recommends), as did Mobile 1 5w30.
Again what it really comes down to is: How do you use the car, and what temperatures will it be operated at?
As far as startup wear, that is why you use a multigrade oil. The first number is the effective viscosity when oil is cold.
In my personal experience on a stage 2 STI engine with reasonable daily driving, Rotella and Red Line were the 2 best oils as far as wear protection and sheer resistance goes. Every oil change and oil brand change had an UOA which is what I based my conclusions off of. Euro Amsoil 5w40 sheered (probably not the same as Ed recommends), as did Mobile 1 5w30.
Again what it really comes down to is: How do you use the car, and what temperatures will it be operated at?
Also how are you able to tell if the oil sheered? I was leaning towards Amsoil Euro 5w40 for the next fill-up (if that's what Ed was recommending).
Would you put Amsoil on that list of recommended oils?
Last edited by Jodice112; 10-05-2011 at 09:19 PM.
10-05-2011 | 11:05 PM
#28
I use redline but they are all good.
