Can someone please tell me the temperature at which diesel starts to gel? Also, if needed what additive is being used for that problem. Thank You.

 

100% #2 diesel fuel has a cloud point around 20 F and a gel point around 0 F.
Cloud point, as the name suggests, is the temperature where the fuel becomes cloudy. Microcrystals are beginning to form here. The crystals are waxes and can clog filters.
Gel point is the temperature at which the fuel solidifies and can no longer be pumped or poured.
Once the fuel temp rises above 20° the fuel will return to normal.

I personally use Power Service and haven't ever had gelling down to minus 35°
In northern climates most diesel is winterized whether you want want it or not. Most is now winterized with additives and some with the addition of #1 diesel (kerosene).

 

Great timing for this post. I just took a look at my clear water drain bowl and the diesel is all sorts of cloudy. I will dump some PS winter stuff in there and hopefully that does the trick.

Do you guys usually used the "prescribed" amount, or more concentration?

 

Stick with the instructions. I think Power Service (white bottle) it's 32 ozs per tank, 16 ozs for 1/2 a tank. Always keep your tank at least 1/2 full around town.

 

More is not better and is just wasting your money. Stick to the instructions.

 

I marked one of the small bottles off into thirds, since that's what it reccomends, and keep that in my tool box, and put a third in per full tank. I buy the big jugs though, it's cheaper that way.

 

Here in Canada, I use Sunoco Gold Deisel (premium). This is what they say at the sunoco.ca web site:
'Gold Diesel also has a de-icer to reduce the risk of winter ice crystal formation and filter plugging. Additionally, the stability additive protects the fuel that is recycled from your engine to your fuel tank, keeping it from decomposing and causing your filter to plug.'