Opti-Lube XL Xtreme Lubricant Diesel Fuel Additive: 1 Gallon with Accessories (HDPE Plastic Hand Pump and 2 Empty 4oz Bottles) Treats up to 1,280 Gallons

An excellent lubricity additive. I use it in my diesel Land Cruiser which has twin 20 gallon tanks. One 4oz application (one small bottle) in each tank is a no brainer and restores fully protective lubrication to the diesel we run nowadays. Pump bottle is great - one squirt is one ounce - 4 squirts per bottle. Easy peasy. Happy customer.

Opti-Lube XPD tested very well in several independent test for lubricity and the XL product is mostly just a lubricity additive and water de-emulsifier so being a concerned Ford 6.7L owner, I use XL at the recommended higher mix rates to help try to ensure my HPFP does not grenade itself. Along with only buying diesel from high volume, quality fueling stations, keeping the tank mostly full, never letting it get below 1/4, draining a few ounces of fuel from my water separator weekly, (I also do 3 key on/off ycles afterwards to ensure the filter housing is full before starting truck as well) and changing both fuel filters at 15K intervals with Ford filters I feel I am doing my due dilligence to protect the HPFP. My truck is completely stock, emissions and all, I do not believe I have seen any gains in power, better mileage, etc. The only thing I do notice is a slightly different smell from the exhaust. Not an unpleasant smell, just different. 2011 F250.

This is a must have product for anybody that runs a CP4 fuel pump. The Bosch pump was not manufactured for USA diesel fuel standards. So if you want to save yourself $15k in repairs to the fuel system add Opti-Lube to your fuel at minimum every other tank.

I’ve used Optilube products in my Ford Powerstroke since I’ve owned it (2016) .Never had an issue with the high pressure fuel pump. I believe based on my research that this product definitely helps protect the fuel system that the ultra low sulfur diesel fuel is so hard on.

Best lube for CP4 pump I've found. Used hot shots in the past and it was decent however when I sent hotshots, opti-lube, and archoil out for lab testing for wear protection the optilube was almost double the protection. Best investment to prevent entire diesel fuel system from being replaced. ****Update the only issue I can say is the pump that comes with it lets product out while riding around in a create in the back of the truck. Wouldn't be such an issue but it's not cheap enough to waste the product.

I am using it in my semi truck since last 6 months. Engine runs smoother and i can see increased milage. Very satisfied from product.

Whether it works or not may never know but anything you can do for your high pressure pump is a good investment. Especially with ultra low sulphur fuels in the US.

Cleans well and protection for the expensive fuel pump replacement for 2.0 TDI diesel motor. Protection for your investment!