I have some Lubro-Moly Winter Flow ordered and on schedule for delivery. The plan was to use it to lower the temperature where diesel starts to have gelling problems. Since I didn't know exactly when it would arrive, I got a few bottles of Power Service to have in case of a cold wave.

Just from reading the ads, it looks like Power Service is going to be the more economical of the two to use. They both cost about the same for a bottle, but I think the Power Service treats (a lot) more gallons per bottle, and Winter Flow says nothing about raising the Cetane rating.

So, assuming they both do what they claim to do, I think the Power Service is going to be the better bargain.

(In warm weather I just use plain diesel or maybe a couple ounces of Red-Line DFC.)

Ken300D