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Old 07-10-2017, 06:25 PM   #1
Usmc75
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Default Amsoil 5w-30

Hey everyone thinking about using amsoil as my go to oil any thoughts on wether I'm wasting money or protecting my investment? It would be going into a 2012 wrx stage1 93.

And can I get away with 3800 miles oil changes or stick to 3k?

Thanks.
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Old 07-11-2017, 07:49 AM   #2
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Originally Posted by Usmc75 View Post
Hey everyone thinking about using amsoil as my go to oil any thoughts on wether I'm wasting money or protecting my investment? It would be going into a 2012 wrx stage1 93.

And can I get away with 3800 miles oil changes or stick to 3k?

Thanks.


Amsoil makes many 5W30's and as someone who has used many oils, including several different Amsoil's, there isn't much to gain by using Amsoil in your application IMO.

I'd just stick with Mobil 1, Castrol, or Pennzoil 0W40 from Wal Mart. If you really want to use Amsoil, go with their 0W40 SS or 10W30 SS. If you're using any of the above you can extend your interval to 5k (at least).
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Old 07-11-2017, 08:20 AM   #3
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Originally Posted by bluesubie View Post
Amsoil makes many 5W30's and as someone who has used many oils, including several different Amsoil's, there isn't much to gain by using Amsoil in your application IMO.

I'd just stick with Mobil 1, Castrol, or Pennzoil 0W40 from Wal Mart. If you really want to use Amsoil, go with their 0W40 SS or 10W30 SS. If you're using any of the above you can extend your interval to 5k (at least).


Hey thank you, any chance you could elaborate on the differences between 5w30, 0w40 and 10w30? From what I was told first number is weight of the oil? I live in jersey so I see all the seasons. my commute is 60 miles a day, and I feel that high quality oil would be ideal in my situation.

I was also reading something stating that at 3800 miles that an oil screen somewhere in the motor can gunk up or something similar? If that's not true then I'll just stretch the intervals every 5k.

Thank you.
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Old 07-11-2017, 01:19 PM   #4
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Originally Posted by Usmc75 View Post
Hey thank you, any chance you could elaborate on the differences between 5w30, 0w40 and 10w30? From what I was told first number is weight of the oil? I live in jersey so I see all the seasons. my commute is 60 miles a day, and I feel that high quality oil would be ideal in my situation.

I was also reading something stating that at 3800 miles that an oil screen somewhere in the motor can gunk up or something similar? If that's not true then I'll just stretch the intervals every 5k.

Thank you.


See Section 3 of the Oil Selection Guide sticky in regards to viscosity. A 0W40 is ideal for NJ and is what I run. Castrol, M1 and Pennzoil are light 40 grade oils and are not overly thick.

For the early turbos, Subaru recommended a 3,750 mile interval due to oil screens clogging and causing turbo failure when using the recommended oil. But this doesn't apply to your car. It applies to mine, and I had a turbo failure due to screen clogging, but I still have my screens and run any of the above oils for 5-6k mile intervals.

The specs that the 0W40's above meet are the toughest in the industry and are run in Porsches, Audi's, and MB's for 10k+ mile intervals.

Amsoil's 10W30's have some of the best specs in the industry (amazingly low volatility), but I get Euro oil from Wal Mart since it's cheap and I don't have to worry about having to run 5W30 for warranty purposes.
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Old 07-12-2017, 02:00 AM   #5
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Not to good oil. Get a better one is my recomendatio
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Old 07-12-2017, 02:01 AM   #6
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I like castrols best for my 719whp 2005 wrx stl cosworth longblock with gt4088r.
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Old 07-12-2017, 02:01 AM   #7
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Redlines oils work aswell.
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Old 07-12-2017, 09:03 AM   #8
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Ill chime in since not many people run amsoil, yes its high quality oil, yes it costs more than some other oils (depending on the product you use) and yes 5w30 is fine. I use just about every single product they make, motor oils, gear oil, firearm oil, power steering fluid, brake fluid etc etc, its all really good stuff and worth the money. My Forester has 295k on it, and gets tracked regularly. In fact i have two this week, one on friday and one on saturday, and i do 4k mile oil change intervals on it and it runs like a champ.

When you cut through all the oil arguing BS on here, any oil will work fine on your engine and protect it while its running. If you run out of oil, or have a oil pressure/pump related failure, it wont matter what oil was in your car. People spend too much time concerning themselves with oil protecting the bottom end, when its the rings and top end where wear is going to occur with cheap/incorrect oils.

The signature series is the top of the line for street use oils, i use the XL line of oils in my cars including my brand new crosstrek. Even though they warranty their oil for 12k miles or whatever, your filter is good for less than half of that so i wouldnt go over 4-5k if you drive the car hard. I say go for it, its good stuff. I like amsoil because its quality product that i can buy everything in one place, the only down side is theres not many local sources if you ever need extra oil so i always buy extra.
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Old 07-12-2017, 09:09 PM   #9
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Quote:
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I like castrols best for my 719whp 2005 wrx stl cosworth longblock with gt4088r.


Hey thanks for the input, what weight are you running 10w or 0w?
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Old 07-12-2017, 09:14 PM   #10
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Quote:
Originally Posted by Bansheeboy11 View Post
Ill chime in since not many people run amsoil, yes its high quality oil, yes it costs more than some other oils (depending on the product you use) and yes 5w30 is fine. I use just about every single product they make, motor oils, gear oil, firearm oil, power steering fluid, brake fluid etc etc, its all really good stuff and worth the money. My Forester has 295k on it, and gets tracked regularly. In fact i have two this week, one on friday and one on saturday, and i do 4k mile oil change intervals on it and it runs like a champ.

When you cut through all the oil arguing BS on here, any oil will work fine on your engine and protect it while its running. If you run out of oil, or have a oil pressure/pump related failure, it wont matter what oil was in your car. People spend too much time concerning themselves with oil protecting the bottom end, when its the rings and top end where wear is going to occur with cheap/incorrect oils.

The signature series is the top of the line for street use oils, i use the XL line of oils in my cars including my brand new crosstrek. Even though they warranty their oil for 12k miles or whatever, your filter is good for less than half of that so i wouldnt go over 4-5k if you drive the car hard. I say go for it, its good stuff. I like amsoil because its quality product that i can buy everything in one place, the only down side is theres not many local sources if you ever need extra oil so i always buy extra.


Hey thank you for your post yea idk why picking the correct oil has always been an issue with me lol between quads and dirt bikes always had to make sure I had high quality oil never really knew why though. I don't know any places that sell amsoil I'm sure advanced or autozone won't carry that stuff and I don't have an o Reilly's in jersey. But I ran amsoil in my old Chevy an that thing ran so smooth.
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Old 07-13-2017, 06:40 AM   #11
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amsoil is good stuff. use the ZROD formula. lots of zinc for boosted motors.
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Old 07-13-2017, 08:52 AM   #12
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Also I'm hearing rotella t6 5w40?
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Old 07-13-2017, 02:56 PM   #13
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Protip: You could go to every shed in your neighborhood and drain out all the lawnmowers in your neighborhood into one bucket. This would net you the same benefit as using Amsoil.

Oil matters LESS than you or everyone thinks here. What matters most is your right foot. Balee dat.
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Old 07-14-2017, 04:22 PM   #14
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Thanks unabomber did my oil change today and said **** it. Wasting to much head space on oil types went with Castro edge 5w30 titanium. Stayed with 5w30 as per owner manual. Gotta be a reason why they specified oil type I mean who ever built the car had a reason to run 5w30.
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Old 07-14-2017, 07:23 PM   #15
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Thanks unabomber did my oil change today and said **** it. Wasting to much head space on oil types went with Castro edge 5w30 titanium. Stayed with 5w30 as per owner manual. Gotta be a reason why they specified oil type I mean who ever built the car had a reason to run 5w30.
Just learned it's for gas mileage. Not protection.
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Old 07-14-2017, 07:28 PM   #16
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So the oil I got is junk?
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Old 07-14-2017, 09:18 PM   #17
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Marine,

That's a quality oil. If you feel anxious, just reduce the change interval to, say every 3k miles, so the oil maintain close to its original viscosity.

Once you're out of the power train warranty, you may consider euro-spec 0w40 with a longer change interval.

Last edited by g-heap; 07-14-2017 at 09:25 PM.
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Old 07-15-2017, 11:06 AM   #18
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Default Amsoil 5w-30

Quote:
Originally Posted by sm0keasaurusr3x View Post
Just learned it's for gas mileage. Not protection.


This exactly. GF5 oils are geared towards fuel economy. Even at 3,000 mile changes the oil will likely shear to a 20 grade, especially on a reflashed WRX.

OP - I'd go with 0W40 for top ups. Even with a quart of Castrol 0W40 it would not be unusual for your oil to drop to a low 30 grade (or 20 grade) in 3k miles.

The car is not stock so I'm not sure why you're concerned about running 5W30. Subaru Japan recommends 5W40 in hard driven WRX's. In fact the Subaru Japan 5W40 is made by Castrol.

Last edited by bluesubie; 07-15-2017 at 11:11 AM.
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Old 07-17-2017, 11:13 AM   #19
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Originally Posted by bluesubie View Post
This exactly. GF5 oils are geared towards fuel economy. Even at 3,000 mile changes the oil will likely shear to a 20 grade, especially on a reflashed WRX.

OP - I'd go with 0W40 for top ups. Even with a quart of Castrol 0W40 it would not be unusual for your oil to drop to a low 30 grade (or 20 grade) in 3k miles.

The car is not stock so I'm not sure why you're concerned about running 5W30. Subaru Japan recommends 5W40 in hard driven WRX's. In fact the Subaru Japan 5W40 is made by Castrol.


Thanks bluesubie, I'm just going to run this Castro for now because it would be a waste of money to dump it now and put 5w40. I'll wait I'll the 3k mark and check my oil regularly thank you for all your help.
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Old 07-17-2017, 11:15 AM   #20
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Originally Posted by g-heap View Post
Marine,

That's a quality oil. If you feel anxious, just reduce the change interval to, say every 3k miles, so the oil maintain close to its original viscosity.

Once you're out of the power train warranty, you may consider euro-spec 0w40 with a longer change interval.


Hey G-heap thank you, been out of the power train warranty for a while now. I'll look into 0w40 for my next oil change. Thanks again.
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Old 07-17-2017, 12:15 PM   #21
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Quote:
Originally Posted by Unabomber View Post
Protip: You could go to every shed in your neighborhood and drain out all the lawnmowers in your neighborhood into one bucket. This would net you the same benefit as using Amsoil.

Oil matters LESS than you or everyone thinks here. What matters most is your right foot. Balee dat.
Big things for oil.......

Keep it at the proper level, ALWAYS!
Check your oil level couple tanks of gas, add as required.

If they "say" it's good for 10K miles it does NOT mean you should go that long. Will they buy you a new engine if it fails due to an oil issue?

Now, what to use? Ask 20 peeps, get 20 answers. Do the above, buy a decent oil (Bob's back shed special blend may be suspect.....) and be happy.

Yes, the very light oils are more for mileage than anything else. The engineers will look at what percentage of engines will fail vs. MPG they can get from a lighter oil.
Cheaper to eat a few blocks than give up mileage. Part of why a lot of new cars don't have a spare tire unless you order it. That's 20 or so pounds the car is not carrying when doing mileage testing.

BTW, the specs in the manual are for a stock engine, you're no longer stock!
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