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

Idemitsu ATF Type HP Transmission Fluid for Subaru – 5 Quart

Product ID: 223889882

Details

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

🔥174°C flash point

⚙️HP spec precision

🛡️Advanced anti-wear tech

596 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Shift smarter, drive smoother — the Subaru HP fluid that means business.

LONG LASTING FLUID LIFE - Exceptional oxidation and thermal resistance means your transmission fluid stays fresh and effective longer.
SUBARU APPROVED HP SPEC - Specifically formulated to meet Subaru’s high-performance transmission standards for non-CVT models.
SEAMLESS SHIFTS ZERO SHUDDER - Precisely engineered frictional properties ensure buttery smooth gear changes and eliminate annoying shudder.
MAXIMUM GEAR BEARING PROTECTION - Advanced anti-wear additives shield critical components, extending transmission lifespan.
CLEAN TRANSMISSION PEAK PERFORMANCE - Superior cleanliness technology keeps sludge and varnish deposits at bay for optimal transmission health.

Idemitsu ATF Type HP Transmission Fluid is a 5-quart, Subaru HP spec certified fluid engineered for non-CVT automatic transmissions. It delivers smooth shifting with anti-shudder performance, superior oxidation resistance for extended fluid life, and advanced anti-wear protection to keep your transmission clean and durable.

Specifications

ASIN	B08CS1P8NJ
Best Sellers Rank	#14,924 in Automotive ( See Top 100 in Automotive ) #52 in Transmission Fluids
Brand Name	Idemitsu
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (440)
Flash Point	174 °C
Included Components	5 Quart Bottle of Idemitsu Type HP ATF
Item Form	Liquid
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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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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596 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered 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 Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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2 weeks ago

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