How can i be sure this is the authentic idemitsu brand and not fake, and, this meets the specs for a 2011 subaru outback 3.6r?

(I'm thinking the 3.6R got the old school 5EAT and not the newer CVT.) The shipment I received appeared to be genuine, equivalent to Subaru ATF-HP. If it was counterfeit, they did an extremely good job copying the bottle and the label; and what would they have put in the bottle that would have been significantly cheaper than ATF-HP but not as good? Bottom line, I don't know how you would tell if the product you received was counterfeit.

What color is good on the stick after 150,000?

New, out of the bottle fluid is red. If you haven't changed it in 150,000 miles I would bet it is dark brown and more viscous. Red is best. For a quick solution, with the motor off you can siphon most of the fluid out of the holding tank and replace it with this fluid. After a week you can do it again and you should be good.

Is this good for 2008 Subaru Outback automatic transaxle (2.5i 4-cylinder engine)?

This is the fluid that Subaru specifies. See page 11-24 of your owners manual for more information on recommended fluids and capacity for your automatic transmission. I use this ATF in my 2008 Subaru Outback 2.5i.

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Idemitsu ATF Type HP Transmission Fluid for Subaru – 5 Quart | For Subaru HP Spec Non-CVT Transmissions | Anti-Wear & Anti-Shudder | ISO & IATF Certified

Product ID: 223889882

Details

Brand
Idemitsu
Flash Point
174 °C
Liquid Volume
5 quarts
Package Information
Bottle
Recommended Uses For Product
Transmission

🔥High thermal & oxidation resistance

⚙️Precision friction control

🛡️Advanced anti-wear protection

4036435₫

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Description

⚙️ Shift smarter, drive smoother — don’t let your Subaru miss out!

LONG LASTING FLUID LIFE - Superior resistance to oxidation and heat means your transmission fluid stays fresh and effective longer.
SPOTLESS TRANSMISSION HEALTH - Keeps your transmission impeccably clean by preventing sludge and varnish buildup.
MAXIMUM GEAR BEARING DEFENSE - Cutting-edge anti-wear technology protects critical components for extended transmission lifespan.
SEAMLESS SHIFTS ZERO SHUDDERS - Engineered frictional properties ensure buttery smooth gear changes and eliminate annoying shuddering.
SUBARU SPECIFIC HP SPEC CERTIFIED - Precisely formulated to meet Subaru’s high-performance transmission standards for non-CVT models.

Idemitsu ATF Type HP Transmission Fluid is a premium 5-quart solution engineered specifically for Subaru HP spec non-CVT transmissions. It delivers exceptional anti-shudder performance, advanced anti-wear protection, and superior oxidation resistance to extend fluid life and maintain transmission cleanliness. ISO and IATF certified, this fluid ensures your Subaru’s transmission operates at peak efficiency and longevity.

Specifications

ASIN	B08CS1P8NJ
Best Sellers Rank	#21,609 in Automotive ( See Top 100 in Automotive ) #61 in Transmission Fluids
Brand Name	Idemitsu
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (444)
Flash Point	174 °C
Included Components	5 Quart Bottle of Idemitsu Type HP ATF
Item Form	Liquid
Item Highlight	For Subaru HP Spec Non-CVT Transmissions \| Anti-Wear & Anti-Shudder \| ISO & IATF Certified
Item Type Name	Idemitsu ATF Type HP Automatic Transmission Fluid - 5 Quart
Liquid Volume	5 quarts
Manufacturer	Idemitsu
Model Number	30040099-95300C020
Number of Items	1
Part Number	30040099-95300C020
Recommended Uses For Product	Transmission Fluid
UPC	810041470027
Unit Count	160 Fluid Ounces

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4036435₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vietnam.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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