MPG Loss?

[firemansdiesel]

Towards the end of July. I had my transmission maintenance & AD 100 installed. Since then my mpg is down about 1-2 mpg. Truck runs fine like before w/ no excessive start up smoke or idling. I am scratching my head why since the transmission fluid, filter & AD 100 install, I all of sudden loss mpg, Any thoughts?

 

[hammersley]

Must be a senior moment.....

AD 100 install... ??????

 

[cerberusiam]

Towards the end of July. I had my transmission maintenance & AD 100 installed. Since then my mpg is down about 1-2 mpg. Truck runs fine like before w/ no excessive start up smoke or idling. I am scratching my head why since the transmission fluid, filter & AD 100 install, I all of sudden loss mpg, Any thoughts?

Noticed any change in the EGT's?

 

[HOBrian]

AD 100 install... ??????

Air Dog 100 Fuel pump.

 

[firemansdiesel]

Noticed any change in the EGT's?

No change in EGT's. Running empty cruising highway speeds flat it runs 600*-650* and pulling up a grade it stays below 1200*... . Boost is usually 4-6 cruising and moves up on WOT. transmission temps stays between the 140*-170*. Normal reading for my truck.

 

[firemansdiesel]

Would switching from Amsoil ATF transmission fluid to Mopar ATF make a difference in mileage? Like I stated above, after I made those changes. My mileage dropped... ... ... . I know the AD100 would have no bearing on it. If anything maybe a tad better of fuel mileage.

 

[RMarkey]

I would think both of those would improve your mpg, not lower it.

 

[cbmkr]

I have noticed the same problem,I just talked to a tech person at Pureflow and they suggested an updated Relief valve pressure Spring. This will get your Pressure up to 17-18 Psi.

Mine is on the way and will give it a try.

 

[JDiepstra]

How do you calculate mileage?

 

[firemansdiesel]

Hand calculate... ... ... .