Help me with my C15 for better mileage ??

Cat shop is the one that turned from 435 to 550 and I did the Bullydog after that. You would think that they would have known about the base plate you are talking about. Yeah I was thinking I should have Cat check the air cooler but would feel bad if my shop saw it sitting there. Don't know what to do. We do short haul and some say what we are getting is all you are going to get. With all the money I have spent with BD, tires, and roof foil would have been better leaving it in my pocket.

 

Also when you guys give your mileage is that calculated yourselves ? The dummy on the dash always lies by .5 mpg.

 

I only know about the base plate from my friend who works at CAT. He works where they do all the training for the U.S. I would try and sell the Bullydog, they just won't do anything for fuel mileage. A smoke test thru the air system and a CAT trained tech to do an over head.

I check mileage each fuel up. Did a trip into the Bay Area here in Cali, up to Redding CA, got 7.46. But average for running the northwest 99% of the time, heavy, with hard pulls, is 6.3-6.4. Overhead will run around $450 and should be done every 100,000 miles, finding someone to do the smoke test will be hard.

 

I have a Bullydog and beg to differ, others on this forum have put them on as well and have gained fuel mileage. Blowing smoke into a CAC to check it for leaks? Lol, sounds like your blowing smoke somewhere other than into a CAC. I haven't been out here for ever, but this is the first I have heard of this. The proper way to test a CAC is a leak down test, blowing cigarette smoke into it will increase your trucks chance of cancer.

 

I hand calculate my mpg's every fillup. You do know that CAT ID has a correction adjustment in it for mpg's? You can play around with it and fine tune what it'll be averaging out for mpg's, getting it much closer to accurate?

 

Bullydog did nothing at all for me for mileage but made it into a nice truck to drive to what was a dog even after Cat upgraded from 435 to 550 and really not much difference which really surprised me. I can monitor how other people drive it and I can set speed and rpm for them too. Was not a total waste. I really don't believe in the 6.5 -7 mpg scaling almost fully loaded as people would be in long lines to buy a truck and go trucking - just don't believe it. I'm just shooting for 6 mpg on a quarterly.

 

Well, most people don't, most shops are parts changers. You need a real tech to pressurize the system and use smoke to find leaks, look it up.

 

what is a cac leak?

 

what is the cac?

 

The thing in front of the radiator that looks like a radiator. Its cools the intake air from the turbo