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🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
🔧 10% OFF with code SAVE10
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Free UK delivery on every order. Orders are processed within 1–3 working days and delivered across the UK in 2–5 working days by tracked service. No minimum spend.
We currently deliver to United Kingdom addresses only. Delivery times are estimates and can be longer for the Highlands, Islands and Northern Ireland or during busy periods. See our Shipping Policy for full details.
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Stanadyne Performance Formula is a diesel fuel additive designed to optimize combustion and protect critical fuel system components. Packaged as a 16 oz bottle, this formula is also available in a convenient case of 12, making it practical for fleets or households seeking consistent maintenance throughout the year.
What sets this additive apart is that it blends with other Stanadyne products and is compatible with existing aftermarket blends. Each bottle covers about 60 gallons of diesel fuel, so a full case covers a substantial portion of a maintenance cycle. The approach is practical and user-friendly, aiming to support smoother operation without requiring dramatic changes to your routine.
Stanadyne Performance Formula is designed for year-round use and is compatible with other Stanadyne diesel additives. OEMs that approve Stanadyne often recommend Performance Formula as part of regular maintenance to help prevent fuel related problems.
Perfect for individual drivers, small fleets, and workplaces that depend on diesel-powered equipment. The formula is designed to be a practical, no-nonsense solution for maintaining fuel system cleanliness, improving combustion, and supporting overall engine performance.
Q: How many gallons does one bottle treat?
A: One 16 oz bottle treats up to 60 gallons of diesel fuel.
Q: Can Stanadyne Performance Formula be mixed with other diesel additives?
A: Yes, it blends with other Stanadyne products; safe to adjust dose, but doubling dose may not double benefits.
Free tracked delivery to any UK address on every order, with no minimum spend. Orders are processed within 1–3 working days and standard UK delivery then takes 2–5 working days; remote areas can take a little longer. You receive a tracking link by email as soon as your order is dispatched.
Please inspect your order on arrival. If anything is wrong, faulty or damaged, email plentytorqueauto@gmail.com with your order number and photos and we will put it right. Changed your mind? Email us before sending anything back and we will confirm the return address and instructions. Hazardous and flammable items cannot be returned. Full details are in our Refund Policy and Shipping Policy.
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