Hi Paul - I think I helped you in calculating the current Stanadyne mix you are using...
Couple things we discussed in making these assumptions:
1. Stanadyne Lubricity Formula is a subset of what is in Stanadyne Performance Formula
a.) Lubricity Formula does not have anything to help with cold starts (which you don't need in SC)
b.) Check attached brochure for a comparison between Performance & Lubricity Formulas
2. Stanadyne Performance Formula didn't fair too well for Lubricity in the "Spicer Study"
3. Stanadyne states that you can mix any of their products = net of mixing these two formulas:
a.) ~3x increase in Lubricity over standard Performance Formula
b.) 50% dilution of following (that are not present in Lubricity Formula)
i.) Wax modifier - Pour Point Depressant
ii.) Wax dispersant
iii.) Freeze Depressant
View attachment 1915
Based on all of the above, I add Lubricity Formula to boost the Lubricity in the Performance Formula
In terms of how we arrived at your current dosing recommendation, we based this on 25 gallon fill-ups:
Stanadyne Performance Formula => 64 oz treats 250 gallons = 3.90 gal/oz.
Stanadyne Lubricity Formula => 64 oz treats 500 gallons = 1.95 gal/oz.
4 oz Stanadyne Performance Formula = Covers ~ 16 gallons
4 oz Stanadyne Lubricity Formula = Covers ~ 8 gallons
My only question is the Treatment Ratio for the Stanadyne Lubricity Formula, as you don't mention how many gallons of fuel that the gallon of Stanadyne Lubricity Formula covers:
- You listed what Performance Formula twice
- Above dosing chart shows a Treatment Ratio that is twice of the Performance Formula
Let's do this: Report back with how many gallons of diesel fuel the gallon of Lubricity Formulas treats (from the label on your jug) and we can recalculate things if the 1:1000 Treatment Ratio from the chart above is not correct...