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 – 1 Quart

Idemitsu ATF Type HP Transmission Fluid for Subaru – 1 Quart

Product ID: 271969366

Details

Brand
Idemitsu
Liquid volume
32 Fluid
Material
(PTFE)
Package information
Can
Recommended uses for product
Transmission

🔥High 174°C flash point

⚙️Precision friction control

🛡️Advanced anti-wear tech

£58.00

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Description

⚙️ Keep your Subaru shifting like a dream — don’t settle for less!

LONG LASTING PROTECTION - Exceptional oxidation and thermal resistance extend fluid life, keeping your transmission running like new.
CLEAN PRISTINE TRANSMISSION - Superior detergency prevents sludge and varnish buildup, maintaining peak transmission performance.
MAXIMUM GEAR BEARING DEFENSE - Cutting-edge anti-wear technology shields critical components from premature wear and costly repairs.
SEAMLESS SHIFTS ZERO SHUDDERS - Precisely engineered frictional properties ensure buttery smooth gear changes and eliminate annoying shudder.
LEAK RESISTANT SEAL CONDITIONING - Optimized seal compatibility reduces risk of leaks by preventing seal shrinkage and cracking.

Idemitsu ATF Type HP is a premium, Subaru-specific automatic transmission fluid designed for non-CVT models up to 2005. It delivers precise frictional control for smooth shifting, advanced anti-wear protection, and superior oxidation resistance to extend fluid life. Certified to ISO and IATF standards, this 1-quart fluid maintains transmission cleanliness and seal integrity, ensuring reliable performance and leak prevention.

Specifications

ASIN	B071X4DVRM
Best Sellers Rank	#106,861 in Automotive ( See Top 100 in Automotive ) #135 in Automotive Transmission Fluids
Brand	Idemitsu
Brand Name	Idemitsu
Container Type	Can
Customer Reviews	4.7 out of 5 stars 169 Reviews
Flash Point	174 Degrees Celsius
Global Trade Identification Number	00852967006096
Included Components	Quart of Idemitsu ATF Type HP
Item Form	Liquid
Item Type Name	ATF Type HP Automatic Transmission Fluid (1 quart)
Liquid Volume	32 Fluid Ounces
Liquid volume	32 Fluid Ounces
Manufacturer	Idemitsu
Material	Polytetrafluoroethylene (PTFE)
Model Number	30040099-75000C020
Number of Items	1
Package information	Can
Part Number	30040099-75000C020
Recommended Uses For Product	Transmission Fluid
Recommended uses for product	Transmission Fluid
SAE J300 Viscosity Grade	5W-20
Specific Uses For Product	Automatic Transmission Lubrication and Maintenance for Subaru Vehicles with HP Specifications
UPC	852967006096 852967006539
Unit Count	32.0 Fluid Ounces
Upper Temperature Rating	174 Degrees Celsius
Upper temperature rating	174 Degrees Celsius

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£58.00

Duties & taxes included

In stock

Sold byAmazon UKDelivered 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 UK.

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