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Adding Airtabs and switching to super singles. Mpg gain?

I just started using fuel gauges and over last 11,000 miles and 13 fill ups I am getting 7.7 miles per gallon. I run 54-55 on cruise and am adding Airtabs to just the tractor and switching from Bridgestone M720's to Michelin XDA Energy super singles. What kind of fuel mileage should I gain? Also I have Centramatics on steer axle should I get them on drives or something else?

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Well I ended up just getting the Airtabs. I am still at 10/32's on my M720's so I figured I will wait til they are worn out to replace them.

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I think you will see 3/10 ths from both of those changes. You will love the stability of your truck from the Airtabs.

If you are switching to super singles I would recommend you use the Counteract balance beads. They will help keep the tire balanced much better than the Centramatics because the tire is so big. Make sure the shop that mounts the tires takes care to keep the inside of the tire and rim dry. make sure they also don't glob on the tire goop either so the bead sets good and even.

I would also invest in the Tru balance centering sleeves also, either the tool or the ones that stay in place and center both drum and wheel assembly.

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I have found using cruise can be bad at times. It controls speed and as soon as i come to a hill turbo goes up fast. I would rather gain a little speed before hill and keep letting off pedal as turbo goes up and down shifting as needed.

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Jeff

I made the change from Bridgestone M720 duals last November to Michelin X-Ones XDA Energy Tires and honestly it was what KR said it would do comparing brand new tires (SS Michelins) to wore out tires (Bridgestone duals) that was a wash on fuel mileage, but will improve as the Michelins wear to maybe a 3/10ths gain when comparing apples to apples on wear.

The Airtabs I added back in the summer last year to my tractor only and it might add 1/10th, but I love the crosswind stability they give and they keep my side mirrors clean.

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so you run UNDER the speed limit?? I would guess a solid 3-4 tenths. I gained that on my T6 running 65 with those mods

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If the speed limit is above 55 then yes I do run below it.

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Brian I run with the cruise on most of the time but when I know a hill is coming up I turn it off and run the hills using the pedal keeping the boost low.

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AirTabs ,,,

Not sure about fuel savings , Must be some I enjoy the stabilization in wind and meeting other trucks ,feels like driveing down a vacuum ,have to use the brakes more as there is less wind drag , Great to have a good Jake Brake

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I would stay with 1" or less wheel offset or you could have premature bearing wear on axles. Many studies have shown that more than 1" offset increases bearing wear by 50% or more. Actually having a 0" offset is the best and still quite stable. Just looks too narrow.

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I tried the super singles for about 5 years didn't see any mpg difference had few problems with the super singles I had them hydro plane 6 different times on me. Tire wear was more excessive than duals I had more flats while I ran the super singles and the cost of super singles are 100 dollars more than duals. I just went back to duals about 6 months ago and like them a lot better. But that's me

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Jeff Harrington will be eternally grateful.
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