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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 05-05-2014, 11:12 PM   #29
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So the right 2-stroke oil would be...?

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.
If I knew, I would have mentioned it.
More of a general statement.
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Old 05-05-2014, 11:30 PM   #30
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2 oz of Valvoline 2 stroke oil with TCw3 per 10 gallons of gas has my car purring smoothly. I'm sold. If it eventually shits a cat out, then I have an excuse to upgrade.
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Old 05-05-2014, 11:33 PM   #31
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I use lucas upper cylinder lubricant. It takes care of the crickets
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Old 05-06-2014, 12:52 AM   #32
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I just started using SeaFoam the last time I filled up, 1oz to a full tank. Will see if it makes a difference.
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Old 05-07-2014, 11:36 AM   #33
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Synthetic ashless.


1oz per 5 gallon. worked wonders on my econoline's v8. The thing has over 100k miles and this was like adding 20ft/tq to the damn thing.


Crickets are gone in the FRS.


The ashless two stroke is intended to be used and combusted at a 1:20 ratio. We're using it a 1:600 or higher so I'm not worried about fouled plugs or cats.
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Old 05-07-2014, 01:20 PM   #34
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2 oz of Valvoline 2 stroke oil with TCw3 per 10 gallons of gas has my car purring smoothly. I'm sold. If it eventually shits a cat out, then I have an excuse to upgrade.
Last fill up I used a couple ounces of the pennzoil tcw3 and I can say the engines quieter smoother and the crickets aren't real noticeable
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Old 05-07-2014, 04:42 PM   #35
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I have used tcw3 2 stroke oil in my k20 for years. Shit's still clean as fuck and my compression is 220 on every cylinder, my valves look brand new. I swear by this stuff. It helps a LOT more when you're running e85 as well, that shit is relentlessly "dry" compared to regular gasoline.
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Old 05-08-2014, 05:57 PM   #36
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So the right 2-stroke oil would be...?

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.
I'm pretty sure any TC-W3 grade oil will work. The spec essentially means "ashless" or no residue/ash after combustion.
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Old 05-08-2014, 06:02 PM   #37
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2 Stroke will drastically lower octane level. I only know this from my near two decades of building and racing rotaries. You can use it, but be careful. A better bet might be MMO.
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Old 05-09-2014, 02:01 AM   #38
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2 Stroke will drastically lower octane level. I only know this from my near two decades of building and racing rotaries. You can use it, but be careful. A better bet might be MMO.
With the quantity per gallon you'd probably use with a rotary, you're probably right. But 2oz in 13 gallons (832oz of gas to 1oz of 2-stroke oil)? I doubt it'd lower octane by 0.1 AKI, if even that.

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Old 05-09-2014, 10:32 AM   #39
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I doubt it would even lower it by .1 lol Maybe hundreth's.
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Old 05-09-2014, 03:39 PM   #40
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With the quantity per gallon you'd probably use with a rotary, you're probably right. But 2oz in 13 gallons (832oz of gas to 1oz of 2-stroke oil)? I doubt it'd lower octane by 0.1 AKI, if even that.

On phone I am. Therefore, if mistakes I make, Frank Oz blame you should.
The rule of thumb is that a ratio of 1/2 an oz per gallon lowers it equivalent to 10 points.
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Old 05-09-2014, 03:44 PM   #41
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The rule of thumb is that a ratio of 1/2 an oz per gallon lowers it equivalent to 10 points.
By points you mean 0.1 octane. 10 points would be 1 octane.

that's 0.1 octane per 1/64th concentration (1 oz. per 1/2 gallon in ounces). now, the concentration we're talking about is 1/832 concentration. That's 13x as diluted. That's less than 0.1 loss in octane.
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Old 05-09-2014, 05:10 PM   #42
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I mean 10 octane.
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