No problem. I add the regular amount starting about now, then out of paranoia double it when the temps are first drifting down to 10F at night. I keep it there at double until it has stayed cold for a month.
Sounds goofy, I know, but the fuel stations will always go lean on the additives early in the season to save money betting that it won't get cold and won't matter. So, doubling protects against them basically not treating at all. After a month of cold, they will have their collective "stuff" in a bucket, and it's safe to go back to label dose. I do start dosing early, because us WI people know how fast a cold snap can blow in. It's the boy scout in me.
Sounds goofy, I know, but the fuel stations will always go lean on the additives early in the season to save money betting that it won't get cold and won't matter. So, doubling protects against them basically not treating at all. After a month of cold, they will have their collective "stuff" in a bucket, and it's safe to go back to label dose. I do start dosing early, because us WI people know how fast a cold snap can blow in. It's the boy scout in me.
Never, ever, ever mix gasoline with your diesel fuel. Gasoline is highly volatile with a much lower flash point. It's also a very effective way of burning a hole through your piston's. I have overhauled a couple of engines over the years that had nuked pistons due to gasoline mixed with the diesel fuel. It's also a good way of destroying your fuel injectors and injection pump since gasoline will negate the little lubrication left in current diesel fuel. Finally, the additive is cheaper to use. Depending on the brand the mix ratio is usually 1 to 1,000 up to 1 to 3,000. It cost only a couple of pennies to use the correct additive. It can cost you thousands in repairs if you use gasoline.