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New STI owner getting confused about engine oil...
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Old 05-31-16, 09:20 AM   #1
capjlee
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Default New STI owner getting confused about engine oil...

I'm a new STI owner and new member on the forums. I tried to keep myself from making a repetitive thread and trying to search the best bang for the buck engine oil and filter change option since I don't know what is in the car now... (Bought the car pre-owned)

After reading a bunch of reviews I was wondering if this is is recommended.

5W40 Rotella T6
Amazon.com: Shell Rotella (550019921) T6 5W-40 Full Synthetic, Heavy Duty Diesel Engine Oil (CJ-4) - 1 Gallon: Automotive

Genuine Mazda (N3R1-14-302) Oil Filter Cartridge: Automotive
http://www.amazon.com/Genuine-Mazda-.../dp/B00HG7G3VA

Is there anything that has to be modified to run this oil filter?

I live in SoCal and have a 2016 STI Base Bone Stock!

Thank you in advance.
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Old 05-31-16, 09:52 AM   #2
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Default Re: New STI owner getting confused about engine oil...

Quote:
Originally Posted by capjlee View Post
I'm a new STI owner and new member on the forums. I tried to keep myself from making a repetitive thread and trying to search the best bang for the buck engine oil and filter change option since I don't know what is in the car now... (Bought the car pre-owned)

After reading a bunch of reviews I was wondering if this is is recommended.

5W40 Rotella T6
Amazon.com: Shell Rotella (550019921) T6 5W-40 Full Synthetic, Heavy Duty Diesel Engine Oil (CJ-4) - 1 Gallon: Automotive

Genuine Mazda (N3R1-14-302) Oil Filter Cartridge: Automotive
Amazon.com: Genuine Mazda (N3R1-14-302) Oil Filter Cartridge: Automotive

Is there anything that has to be modified to run this oil filter?

I live in SoCal and have a 2016 STI Base Bone Stock!

Thank you in advance.
No need to be confused, Shell RT6 5W-40 and Mazda RX8 oil filter is safe to use on the STi. Go change your oil.
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Old 05-31-16, 09:58 AM   #3
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Default Re: New STI owner getting confused about engine oil...

Nothing wrong with those options. RT6 is very popular here and the Tokyo Roki filters have been proven to work better than the OEM blue filters. I run those two and oil analysis always comes back with positive marks. No modifications necessary to run Tokyo Roki filter... although they are becoming hard to find on the shelf from Mazda dealers. Last time I got mine they only had one that was sitting there for a month.
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Old 05-31-16, 10:00 AM   #4
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Default Re: New STI owner getting confused about engine oil...

Quote:
Originally Posted by ajsti24 View Post
No need to be confused, Shell RT6 5W-40 and Mazda RX8 oil filter is safe to use on the STi. Go change your oil.
Thank you. I just needed reassurance before my first move as a STI owner was a bad one.

Quote:
Originally Posted by UrdnotWrexSTi View Post
Nothing wrong with those options. RT6 is very popular here and the Tokyo Roki filters have been proven to work better than the OEM blue filters. I run those two and oil analysis always comes back with positive marks. No modifications necessary to run Tokyo Roki filter... although they are becoming hard to find on the shelf from Mazda dealers. Last time I got mine they only had one that was sitting there for a month.
I probably will just subscribe to the amazon listing I just posted since they are both prime-able

Thank you both!
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Old 05-31-16, 10:20 AM   #5
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Default Re: New STI owner getting confused about engine oil...

Just the same advice I always say....

If you are in warranty and don't want any raised eyebrows IF something happens, use the recommended Full Synth 5w30 that the OM calls out. More so with this car since you probably don't know the previous owner or how it was cared for.

The Tokyo Roki blacks are great filters. Being scientifically-minded, I wouldn't say in any universe that they are "proven better" than the OEM blues. But that's just me. Puro's and WIX filters are also great filters as well. Base FRAMs are horrible.

That said, I'm more concerned with how often you change your fluid/filter than what filter/oil weight (within reason of course) is really used.
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Old 05-31-16, 03:32 PM   #6
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Default Re: New STI owner getting confused about engine oil...

If you are bone stock and you drive the car normally, you have a warranty and the normal oil and filter will be fine. You probably have 2-3 years of free oil changes at the dealer anyway.

The reason people go to higher viscosity oil (like 5w-40) is because it helps protect the engine under higher loads and temperatures. So if you have power mods or track the car. For instance the z06 manual says to run 5w-30 on the street and to change it to 10w-50 for track use and then to change it back to 5w-30 for the street again. It's one of the only cars where tracking it doesn't void the warranty and the dealer will do those oil changes for you for free for the first 6 or so. Subaru says "These warranties do not cover damage to any component that is the result of operating the vehicle in any competition or racing event." So track your car and spin a bearing in the engine and they have the right to say that it's not covered.

You can find more information about oil and what it does here: Technical Info - King Bearings - Engine Bearing specialist
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Old 05-31-16, 04:53 PM   #7
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Default Re: New STI owner getting confused about engine oil...

I see. Should I consider swapping any other fluids?

Transmission fluid? Differential?

If so, what brands are recommended and brand types?
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Old 05-31-16, 05:14 PM   #8
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Default Re: New STI owner getting confused about engine oil...

Quote:
Originally Posted by capjlee View Post
I see. Should I consider swapping any other fluids?

Transmission fluid? Differential?

If so, what brands are recommended and brand types?

Both. I changed my tranny and diff every other oil change... or around that time. It's super easy and your under there anyway.

The tranny used to use Subaru's "Extra-S"... it's now "HPGO" (High Performance Gear oil)... It's basically 75w90.... Same stuff goes in your rear diff.

as for brand.. any synthetic really. I personally don't like Valvoline, but that's my preference.
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Old 05-31-16, 07:23 PM   #9
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Default Re: New STI owner getting confused about engine oil...

If I chose the Motul which should i choose? 300LS or 300?

Also, for differential I don't need special type? I could use the 300LS or 300?
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Old 05-31-16, 07:30 PM   #10
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Default Re: New STI owner getting confused about engine oil...

Quote:
Originally Posted by capjlee View Post
If I chose the Motul which should i choose? 300LS or 300?

Also, for differential I don't need special type? I could use the 300LS or 300?
For transmission/front differential and rear differential fluids i recommend Motul Gear 300.

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