how about putting this in rear end oil with locker or limited slip gears..OK to do or not. Thinking too thick for transmission right??

You can use this in your rear end and your transmission. You will see great results in both. You can use the 9100 anywhere you want to reduce heat and friction. Not only do we sell the products we also have a fleet of 40+ vehicles that we use the 9100 in engine oil, transmissions, rear ends and power steering systems, also is great if you have front oil bath type bearing. Please let us know if you need anything else.

Does this work in any engine? I haven't read anything to suggest it doesn't but all the reviews come from only Powerstroke owners.

It works well in engines using a high pressure oil rail to power the injectors, not sure why you would run it in a Cummins or any other common rail or high pressure fuel/injector nozzle or gas engine, just run rotella t-6 synthetic oil and a good filter to keep those running strong for a very long time.Also nearly any diesel will benefit from a quality fuel additive, I find in all 6 of my trucks (3 brands) that power service diesel kleen will more than pay for itself in fuel Economy improvements alone (about 5-15%).

can you use this with full synthetic oil

Yes. I use Synthetic oil, Rotella T6 for diesel applications. It provides better lubrication, for longer intervals. Works great with Archoil.

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Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems

Archoil AR9100 Oil Additive (16oz) for All Vehicles - Powerstroke Cold Starts, Eliminates Injector Problems

Product ID: 284275607

Details

Brand
Archoil
Item weight
16 Ounces
Liquid volume
16 Fluid
Material
Fluid
Package information
Bottle

🔥Extreme pressure & antiwear protection

⚙️Nanoborate friction modifier

❄️Fixes PowerStroke cold start injectors

¥20777

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Description

⚡ Unlock peak engine power & silence the noise — your ride’s secret weapon!

COLD START SAVIOR - Eliminates injector stiction in 6.0L & 7.3L PowerStroke engines for smooth, reliable startups.
OIL LIFE EXTENDER - Keeps your crankcase cleaner and oil fresher, maximizing maintenance intervals and performance.
NOISE HEAT REDUCER - Cuts engine noise, vibration, and heat for a quieter, cooler ride under any condition.
UNIVERSAL ENGINE ALLY - Compatible with all diesel & gasoline engines, gearboxes, hydraulics, and differentials.
NANOBORATE POWER BOOST - Forms a solid lubricating film to slash friction and wear, extending engine life.

Archoil AR9100 is a cutting-edge nanoborate oil additive designed to reduce friction, wear, and corrosion across diesel and gasoline engines, including gearboxes and hydraulics. It uniquely solves cold start injector issues in PowerStroke 6.0L and 7.3L engines by lubricating stuck valves, resulting in smoother startups, less engine noise, and extended oil life. Trusted by thousands with a 4.7-star rating, AR9100 delivers extreme pressure protection and improved fuel efficiency for professional-grade vehicle care.

Specifications

ASIN	B005UO70ZO
Best Sellers Rank	#81,152 in Automotive ( See Top 100 in Automotive ) #322 in Oil & Fluid Additives
Brand Name	Archoil
Compatible Material	Diesel and Gasoline Engines
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (3,893)
Global Trade Identification Number	00608819243337
Item Form	Oil
Item Weight	16 Ounces
Liquid Volume	16 Fluid Ounces
Manufacturer	Archoil
Material	Fluid
Model Number	AR9100-16
Number of Items	1
Number of Packs	1
Part Number	FBA_AR9100-16
Recommended Uses For Product	Automotive, Mechanical
Specific Uses For Product	Prevent Corrosion
UPC	608819244198 608819243412 608819243337
Unit Count	16 Milliliters

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¥20777

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

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