AR9100 Friction Modifier
AR9100 Friction Modifier
AR9100 Friction Modifier
AR9100 Friction Modifier
AR9100 Friction Modifier

AR9100 Friction Modifier

Sale price$44.95

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• Eliminates hard/cold start issues caused by HEUI injector misfires in 6.0L & 7.3L Power Strokes

• Suitable for use in all diesel and gasoline engines

• Forms a solid boundary lubricating film to improve performance and protect engines, gearboxes and hydraulic systems

• Increases power and response

• Reduces engine noise and vibration

• Extends oil drain intervals

Use one 16 oz bottle to treat a Power Stroke

Use 1.2 oz of AR9100 per quart of engine oil

Use 1.2 oz of AR9100 per quart for limited slip differentials

Treat motorcycles, wet clutch or not, at 1.2 oz per quart

Treat gear oil, hydraulic oil and power steering systems at 3.2 oz per quart

AR9100 Friction Modifier

Archoil's AR6500 Diesel Treatment AR9100 forms a solid boundary lubricating film that improves performance, offers extreme pressure protection and protects engines, gearboxes and hydraulic systems. AR9100 is suitable for use in all diesel and gasoline engines and eliminates injector stiction problems in 6.0L & 7.3L Power Strokes.

"Attention Power Stroke Owners - AR9100 Friction Modifier ​is 100% GUARANTEED to eliminate STICTION in diesel vehicles with HEUI injector technology within 100 miles or your money back!" - Bill Hewitt


Deposits and wear in HEUI injectors cause them to become stuck. This cause 6.0L & 7.3L Power Strokes to suffer frmo hard starting, rough idling, reduced power, bucking and smoking. This problem is known to Power Stroke uses as 'stiction' (from 'static friction').


Add Archoil AR9100 Friction Modifier at an oil change to eliminate the issues caused by HEUI injector misfires. AR9100 cleans out HEUI injector deposits and creates a friction-reducing film to ensure all eight injectors fire every time.


If AR9100 does not resolve stiction issues in your 6.0L or 7.3L Power Stroke within 100 miles of driving, get in touch with us and we will refund your purchase.

AR9100 + AR6400-D

Save more when you buy an Archoil Performance Kit. This kit includes AR9100 Friction Modifier (16oz) and AR6400-D Diesel Fuel System Cleaner (12oz).

Use these two products every oil change/5,000 miles to protect your engine and fuel system while also boosting performance. AR6400-D treats 40 gallons of diesel.

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This is the must-have kit for your diesel vehicle, including AR6500 Diesel Treatment (40oz), AR9100 Friction Modifier (16oz) and AR6400-D Diesel Fuel System Cleaner (12oz).

AR9100 eliminates stiction and associated cold start problems in 6.0L & 7.3L Power Strokes while AR6500 provides regular maintenance to your fuel system at every fill-up, combating issues associated with poor quality diesel. AR6400-D provides a powerful, one-tank cleaning service to remove harmful carbon build-up from the fuel system.


Customer Reviews

Based on 72 reviews
Wayne Jennings

AR9100 Friction Modifier

Craig Nichols
Great Results

No Archoil product has ever not performed as described.

Mark Bryant
Instant start up

After using Archoil, instant starts from the injectors. Cures long cranks and smooth idle. Use it every oil change. Satisfied 6.0 owner.

David Hughes
I will continue to use this with every Oil Change

Helps to quiet down the injectors and provides better lubrication. I once had developed some stiction issues with my 05 Excursion at about 120k miles. But they went away when I started using this.

Barry Paulison
This works great

I have a 05 Ford F350 6.0 with 235,000 miles on it I tow a 5th wheel about 14,000 lbs using the archoil oil treatment the truck runs great it's quieter also I use the fuel treatment together makes the truck preform great and better fuel economy