Join Date: Dec 2008
Location: Spokane WA. area
Thanked 990 Times in 755 Posts
Problem with fuel in alot of cold climate zone areas of the country is, it's treated no.2 summer fuel yr round. This is true in my area too. How much it's treated with anti gel at the pump depends on the station and company, and they try to anticipate when to treat more and less. When a sudden cold snap like were experiencing comes around, it's usually a case of too little too late. And even when they do treat at max levels, usually 1000:1 compared to 1500:1, the treated no.2 summer fuel is only good between -5 and +5 degrees before total wax drop out occurs and can clog the filter, and the finer the filtration, like 2 micron, the easier it clogs.
I have found that most over the counter anti gels do very little to improve already treated no.2 summer fuels from the pump, but can be effective at treating untreated no.2 fuels down to around 0F if maximum dosed.
Just east of my location in Montana and North Dakota they offer no.1 fuels in various percentage mixtures at the pump. This is still the best and proven way to prevent fuel problems in the cold.
The best anti gel additive for winter I have come across is FPPF Polar Power or Total Power. The problem is these chemicals are mostly mineral turpentine and glycol ether, but are effective, and it only takes one time of being stuck in the cold from gelled fuel to wanting something effective in your fuel tank.
Bismic is correct when he said that the anti gel must be added before freezing temps into the fuel to work correctly. The only thing is though, all diesel fuels have different characteristics and depending on where the crude oil and refining processes came from, different anti gel formulations can have very little or very much effect on the types of fuel they are being used in.
I too have never seen the Archoil AR6200 freeze up at any temps, even though it's not an anti gel it stays liquid.
I really wish it was manditory for stations to post the fuel specs at the pump. Seems no one gives a hoot in the diesel fuel industry, at least in my area. And if you ask the station attendants, they never know anything but when to take a smoke break.
Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)