my c15 acert 435hp getting over 8.3MPG

pullin pant legs up!LOL Nope, in a one word answer. FPPF has been around for years. if it aint broke don't fool with it!

 

How many tanks have you run? I would imagine you need several months of different types of driving and fuel sources to get a real handle on any improvements.

 

Put two bottles in. You should get 9.3

 

I believe you. I got that kind of milage out of my Acert running CA OR WA. But as soon as I left those states back down to 6.7. I dont like that additive. It smells like alcohol to me.

 

FPPF is a joke. $8 for 2 oz of rubbing alcohol and acetone. Like paying $4 for 5-hr energy.

 

I got 8.7 yesterday just from watching my scan gauge and adjusting my heavy foot. Ive also adjusted my speed to granny speed,that was the hardest part. All the other drivers made fun of me until I showed them the proof,and I STILL made it the same time they did and they were weaving in and out of traffic and hauling ###. So I saved over $200 in fuel this week just from a small adjustment. I don't w ant to put those additives in my engine,I've heard good,bad,and ugly about those things. And since I'm not a qualified expert,I just shy away from them. But glad you did well on your mpg's.

p.s. (of course mine isnt that good when I'm very heavy,no matter what I do)

 

I get better than 36 miles per gallon running down cabbage and it didn't cost me anything. Go ahead and put those additives in your tank but I think it's funny when the government and several truck lines are running test and they are getting about 9.? running total gross of 65,000 pounds for their test and all the aerodynamics they are adding when all they need to run is 2oz of some liquid maybe it's nitroglycerin. I've been trying to find ways to get more mileage. their big rigs features a higher efficiency engine and a aerodynamic tractor trailer that significantly deduces drag and the truck also includes a system that converts exhaust heat into power delivered to the crankshaft with electronic controls that use route information to optimize fuel use such as tires and they are single tire configuration to lower rolling resistance also weight is lighter as truck is built with much lighter material from the tractor to the trailer. We are talking about thousands of pounds lighter rig empty. To this day there is no data as to how long these type trucks will hold up under the pounding of todays roads. If you look at the picture of my feather light trailer it has single tires and is much easier to pull than a regular trailer because there is no air dam under it and my truck sets close to tractor and I don't get drag between tractor and trailer. I am changing all my tires to singles. I'm getting 6.9 loaded and have my truck at set at 73. When I leave Washington State I have 44 hours to make it to SC and they pay and I run. if I ran 60 it would take me about 10 hours longer to make my run and a turn it would be 20 hours longer. I'm happy with my bottom line as a round trip pays $16,000. My new T2000 is not getting as good mileage so when it get's into the shop I am changing the 13 speed to a 9 speed to go with it's 258 rears and the 600 has no problems pulling all the hills around Washington. Turbo is set at 42 pounds of boost, If I began to run over 12 hundred I can change to 8th as I have no limiter on anything but 9th.

 

You will do better with mods to your ecm, exhaust, and valve adjustment.