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Old 05-12-2014, 02:41 PM   #1
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Default What oil and weight for my motor

I know there's probably a lot of threads on this but i have pretty detailed specs on my build and figured maybe I can get more detailed advice from the experts here.

BP4W built bottom end (mains .020 rods .017)
BE street/strip oil pump, unshimmed
EFR6258 turbo (you guys mutually talked me out of FM2)
FM Oil Cooler
FM Coolant reroute

The motor right now has 522 miles on it and so far has been behaving well.

The initial start was done with conventional oil (10w30) and after we let the car warm up and tested certain things it went for a short 10 mile drive and was drained.
At a total of about 60 miles of driving and tuning the start we drained oil and re-filled with conventional (10w30).
At the 250 mile mark we drained the oil again and re-filled with Amsoil Signature Synthetic 10W30. I had my buddy follow me as I did some 6psi pulls and he said there's no smoke from exhaust so things are going well.

Next week I have an appointment with the well known Ken Hill to have the car tuned for it's ultimate goal which is around 325whp which I aim to hit on 15psi (have some headwork).

The car is a pleasure vehicle that will be driven about 3000-4000 miles per year, often in a spirited fashion, but also just for commuting to work on nice days, taking trips to Atlantic City (about 80 miles one way) etc. It may see track time, but not on any kind of regular basis.

My question is knowing my engine setup, bearing clearances, etc. what weight oil would you recomend. I am basically a tossup between Amsoil Signature Synthetic (although they have a few other alternatives) and Shell Rotella T6 which is available locally only in 10w-40.

Any help appreciated!
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Old 05-12-2014, 03:08 PM   #2
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No Walmart nearby? They all have T6 in 5w40 around here. M1 Turbo Diesel Truck 5w40 on the shelf too.
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Old 05-12-2014, 03:09 PM   #3
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T6 in e'er'thang!
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Old 05-12-2014, 03:10 PM   #4
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No Walmart nearby? They all have T6 in 5w40 around here. M1 Turbo Diesel Truck 5w40 on the shelf too.
Lots of Wally Worlds, but I wasn't sure on weight. I believe they stock on the shelf either 5W40 or 10W40. Why is it called diesel oil? Safe to run in the BP?
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Old 05-12-2014, 03:12 PM   #5
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It's because of delicious nutrients and additives. High zinc content. BP loves that ****. Turbos love that ****. You love that ****.

You put it in everything.

The answer is always: Rotella, Amsoil Dominator Grease, and Frank's Red Hot.
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Old 05-12-2014, 03:13 PM   #6
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It's because of delicious nutrients and additives. High zinc content. BP loves that ****. Turbos love that ****. You love that ****.

You put it in everything.

The answer is always: Rotella, Amsoil Dominator Grease, and Frank's Red Hot.
I noticed Amsoil had the Zinc Enriched "hi-z" oil as well. How's their Dominator oil line for street use?

I do love me some franks red hot, but I tend to keep it out of the car haha
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Old 05-12-2014, 03:14 PM   #7
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Maybe I'm showing my Fountain Square hipster-ness, but Sriracha > Franks Red Hot.
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Old 05-12-2014, 03:15 PM   #8
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Originally Posted by Mazdaspeeder View Post
I noticed Amsoil had the Zinc Enriched "hi-z" oil as well. How's their Dominator oil line for street use?

I do love me some franks red hot, but I tend to keep it out of the car haha

Dunno.... i'm a dealer, but i'm pretty sure i can still get Rotella for cheaper than my cost for the Amsoil unicorn jizz motor oil. Basically... i haven't used the motor oil yet.

I will in the DD when it runs again, since i run 20w-50 in that. If you can wait a couple months for an update, i can give one to you.
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Old 05-12-2014, 03:16 PM   #9
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Maybe I'm showing my Fountain Square hipster-ness, but Sriracha > Franks Red Hot.

They're both just barely edible, just depends if you want a double dose of salty, or a sweet chemically tang.

Both of them are pretty much the worst hot sauces known to man.
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Old 05-12-2014, 03:22 PM   #10
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Dunno.... i'm a dealer, but i'm pretty sure i can still get Rotella for cheaper than my cost for the Amsoil unicorn jizz motor oil. Basically... i haven't used the motor oil yet.

I will in the DD when it runs again, since i run 20w-50 in that. If you can wait a couple months for an update, i can give one to you.
I can't cause I have to drain the oil on the morning of the 20th so tuner has a fresh start for his work.

Sometimes I worry that the practical use of "race" oils and "race" bearings is actually a bad thing for street use, but I got ACL Race bearings anyway
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Old 05-12-2014, 03:23 PM   #11
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T6 is $21 at walmart.... its delicious ****... i put it on, and in everything....
Im sharpening a knife using T6 as a stone lubricant right now as we speak..... i keep a jug in the trunk of the miata, 3 jugs in my closet, a jug in the garage, and a jug split up between 3 dispenser bottles for parts lubrication, skate bearings, and knife sharpening.... lmao
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Old 05-12-2014, 03:24 PM   #12
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Originally Posted by Mazdaspeeder View Post
I can't cause I have to drain the oil on the morning of the 20th so tuner has a fresh start for his work.

Sometimes I worry that the practical use of "race" oils and "race" bearings is actually a bad thing for street use, but I got ACL Race bearings anyway

You're overthinking this. Go to Wally World, get an ego boost from looking at all the dregs of society hanging out there, and grab a couple blue jugs of that Grade A slippery ****.
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Old 05-12-2014, 03:26 PM   #13
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You're overthinking this. Go to Wally World, get an ego boost from looking at all the dregs of society hanging out there, and grab a couple blue jugs of that Grade A slippery ****.
And 5w-40 is OK for me to get? If so I'm gonna get a jug on way home today
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Old 05-12-2014, 03:27 PM   #14
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They're both just barely edible, just depends if you want a double dose of salty, or a sweet chemically tang.

Both of them are pretty much the worst hot sauces known to man.
This is a very true statement... although i have multiple bottles of both in my fridge.... accompanying about 40 other bottles/brands of hotsauce.

Blairs is delicious.... until you get up into the HOT hot stuff... then its just spice with no flavor, but their hot and sweet, and jalapeno, and honey sauces are amazing
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Old 05-12-2014, 03:28 PM   #15
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And 5w-40 is OK for me to get? If so I'm gonna get a jug on way home today

It's what we all use when we refer to T6, yes. Might want to grab two if you have any more capacity than stock. It only comes in gallons.
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Old 05-12-2014, 03:29 PM   #16
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It's what we all use when we refer to T6, yes. Might want to grab two if you have any more capacity than stock. It only comes in gallons.
Good idea, I've gotta make sure the cooler and lines have enough as well. I think last time it took ~4.5qts.

Thanks for everyone's help!
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Old 05-12-2014, 03:31 PM   #17
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Better make it 3. 2 for the car, one for more... personal use.
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Old 05-12-2014, 03:32 PM   #18
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Diesel oil is high in Zinc, which is a great anti-wear additive, but it "contributes to heavy metal pollution" so it got banned from auto-rated oils back in the 90's IIRC. Diesel oil is also high detergent, as diesels have lots of blowby, so it cleans your internals as well. For me, the 40 is nice as it gets hot here in summer. Older BMW's (the ones that actually have a range of oil weights in the manual depending on ambient temperature ranges) spec a summer oil for my climate at 20w50.

Aside: Dude. I have at least six bottles of hot sauce in my fridge. Tapatio, Frank's Red Hot, Sriracha, Cholula, Chipotle Tabasco, Green Tabasco, some hot **** I got from Trader JosŤ... all of them have different uses.
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Old 05-12-2014, 03:32 PM   #19
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And 5w-40 is OK for me to get? If so I'm gonna get a jug on way home today
Most definitely. Im pretty sure thats all Rotella T6 comes in, but almost all of us on here use that magical shiz. That Notorious NA lifter tick sound was gone instantly after startup with T6, and never came back.... NEVER... lol
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Old 05-12-2014, 03:37 PM   #20
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I wonder what it will do to my oil pressure. I can somewhat monitor it via my center gauge since I have the real-time sender in the side of the block.

I don't really have any ticking but I went ahead and bought the proper valve shims when I rebuilt my head so everything is in spec (I think intake was .008 exhaust was .009) across the board. It's a very quiet motor.
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