Stanadyne Diesel Performance Formula 38566, 64 Ounce

Awesome product. Great price. Use it in my 2018 Duramax.

Works great treating fuel.

Great value and quality product

Great product

Stanadyne does not provide the results of HFRR results for this additive. Contacted them HFRR data - they answered that they outsourced additives to a different company (Parker Hannifin) and I should contact them. In my opinion if you name is on the bottle you should now stuff about it, or redirect the request accordingly, not to football people. According to Spicer Report on lubricity improvement additives this additive makes a tiny improvement: -33µm for values 350-400µm. Under 10%. Did not see data for cetane improvement. Bought lubricity formula from Opti Lube, will probably switch to them for Performance formula too. But not a bad product per se.

Powerstroke

I’ve used this product for years and I love it! This was a good value way to purchase and shipped to me where I was visiting away from home.

Been using Stanadyne product in my '97 Dodge 3500 for 23 years, 232,000 miles. Never had any fuel or injector problems. Use it year round. But only use a small quantity (25%) of winter recommendation. It is a great cleaner/lubricant in the summer. I think it also helps fuel mileage. 20-22 in town and 25-26 on the road. Definitely recommend.