Can This be true??

[Jerky]

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Anybody know anything about conklin products? Could this be possible with a ford power stroke and conklin products? I
don't know what year it was or if it was an auto or
manual. But he said he got something like 37.6 or 36.7
something like that miles per gal. To get that mileage
the only thing he did was.
1. used conklin 15w40 parasynthetic oil
2. diesel fuel additive called 4-power once every 7
or 8,000 miles and a fuel mate additive every time he
fueled up. 1 oz. per 10 gal.
3. had conklin oils in all his gear boxes
4. had conklin "Rhino" grease in his wheel bearings

I know my Dodge won't do this. - Dean