How many oz per tank full

The answer depends on your tank size. Standard treat rate is 1/4 oz per gallon of diesel fuel, or 1/2 oz per gallon if temperatures are consistently below 32F. For a 32 gallon tank you will use 8 oz, or 16 oz if it is consistently below freezing (32F).

I saw a study showing the usage rate to be 13 ozs per 26 gallons of fuel, has this changed? I see now the concentration calls for 8 ozs.

The most recent lubrication tests have been done at the 1/2 once per gallon so 13 oz per 26 gallons. That is the premium ratio listed on our website. You may just want to experiment with your truck to see where it runs the best. start with the 13oz and lower each tank going forward and see if you get better fuel mileage. If your in colder weather, you may want to stick with the higher ratio till it warms up.

Why is this priced 50% higher than msrp? msrp is $53.65 a gallon

Check the vendor. Or order directly from Optilube. Amazon vendors are free to charge whatever they want,

Can you run this in summer as well. I ask because it performes better than the summer Opti - lube formula when it comes to lubricity

Many customers run the XPD year round. Some for different reasons but the HFRR tests is one reason. Others so they only have to handle 1 formula and can buy in bulk.

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Opti-Lube XPD Formula Diesel Fuel Additive: 1 Gallon without Accessories

Product ID: 683120529

Details

Viscosity
5W sae_grade
Brand
Opti-Lube
Vehicle service type
Truck
UPC
853001004146
Manufacturer
Opti-Lube

🧼Cleans & protects injectors

⚙️Boosts engine power & efficiency

🛢️Doubles diesel fuel storage life

Description

🚀 Fuel smarter, drive stronger — never settle for less!

INJECTOR GUARDIAN - Keeps fuel injectors spotless, reducing deposits and ensuring peak performance.
POWER UP YOUR DRIVE - Experience improved fuel economy and increased engine power with every mile.
COLD WEATHER WARRIOR - Enhanced water separation and cold weather performance for reliable starts anytime.
FUEL FRESHNESS EXTENDED - More than doubles diesel fuel storage life, so your fuel stays fresh longer.
RUST CORROSION SHIELD - Prevents damaging rust and corrosion to extend your engine’s lifespan.

Opti-Lube XPD Formula is a premium diesel fuel additive designed to enhance lubricity, improve fuel economy, and increase engine power. It cleans and protects injectors, reduces deposits and emissions, prevents rust and corrosion, and significantly improves cold weather performance and fuel storage stability. Compatible with all vehicle emissions systems, it’s the ultimate upgrade for diesel engines.

Specifications

ASIN	B00FOSSQJU
Best Sellers Rank	834,743 in Automotive ( See Top 100 in Automotive ) 1,248 in Fuel Systems
Brand	Opti-Lube
Customer Reviews	4.8 4.8 out of 5 stars (621)
Date First Available	7 Oct. 2013
Guaranteed software updates until	unknown
Item Weight	3.52 kg
Item model number	OPT-XPD1-NA
Manufacturer	Opti-Lube
Manufacturer part number	OPT-XPD1-NA
Product Dimensions	17.78 x 11.43 x 25.4 cm; 3.51 kg
Voltage	12 Volts

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