Fuel economy

[NomadA32]

That’s great mileage.
I’d say you should be able to possibly get another 1-2 MPG’s by reducing your highway cruising speed to something between 55-65.

definitely, try telling my foot that

 

[zx12-iowa]

Not a 5.0 result, but on a 3.5 eco, going from 87-93 moves my average from 16 to 17.5. Is a 9.5% increase plus I have noticeable power increase. At 15000 miles a year my math shows

87 octane (16 mpg at $2.75/gallon)= $2,578
93 octane (17.5 mpg at $3.10/gallon)= $2,656.

So costs more but more power for under $100/year

 

[CAMDENN]

I have 35's on my 3.5 and got a whopping 16MPG on a 400 mile road trip

….But the cool factor of 35’s more than make up for your MPG’s right?

 

[roadrunr]

…..So what you’re saying is that in order to get the MPG that I posted, one has to be and or drive like an old man of which I don’t fall into either of those categories.

Got it youngster.

I wasn't saying that at all, I do believe it was a question...

 

[CAMDENN]

I wasn't saying that at all, I do believe it was a question...

And I was just being sarcastic.
No harm no foul.
All good.
Enjoy your weekend.

 

[williejack]

Scientifically speaking, 93 octane is your best chance from the pump for efficiencies. Economically speaking it doesn’t really prove out after added cost. I ran 93 since day one so I can’t say if anything less would be the same but I could get 700 miles out of a tank for highway trips if I didn’t go above 75. That number is about 600-650 still after my Whipple, strictly highway of course and I’m sure I could probably do a little better if I really tried. Stock I had a 20.1 average

What size tank?

 

[ApolloChurchill]

What size tank?

36 Gallon, only option for Tremors. Would love to add a transfer tank one day though.

 

[ReidPfromNC]

I transverse North Carolina too often and I pay way too much attention to the fuel economy of 5.0 with a Whipple. But still I do it as a challenge and can substantiate several previous points made; right around 20.0 is the BEST I can do at 5 over, straight highway trips, so 75 when I can. 70 and below is significantly better. The wind makes about a 1.5-2.0 diff on mine also, headwind vs tail, so a lil tailwind for anything approaching or bettering 20.anything. My mileage from near day one is sitting on 15.5, which includes quite a few 0-105 mph digs, and over 4000 miles of towing, often ~5000# at 11-12mpg, and damn it pulls good. So I’m very happy with my mileage, esp compared to a similar HP RaptorR or TRX.

 

[roadrunr]

I transverse North Carolina too often and I pay way too much attention to the fuel economy of 5.0 with a Whipple. But still I do it as a challenge and can substantiate several previous points made; right around 20.0 is the BEST I can do at 5 over, straight highway trips, so 75 when I can. 70 and below is significantly better. The wind makes about a 1.5-2.0 diff on mine also, headwind vs tail, so a lil tailwind for anything approaching or bettering 20.anything. My mileage from near day one is sitting on 15.5, which includes quite a few 0-105 mph digs, and over 4000 miles of towing, often ~5000# at 11-12mpg, and damn it pulls good. So I’m very happy with my mileage, esp compared to a similar HP RaptorR or TRX.

Yeah, I'm about to tank my lifetime mpg average with a roughly 3000 mile trip towing over the next 2 weeks...unless plans change (we have an idea where we want to go but it's fluid).

 

[williejack]

36 Gallon, only option for Tremors. Would love to add a transfer tank one day though.

Much more than that can be a real danger in gasoline but some guys have done that on some older gas trucks. One of our Fords is a F-250 super duty Roush diesel with 64 gallon tank gets about 1,200 miles on one tank. I also have the 36 gallon tank but have only managed about 520 miles per tank. Have not run 93 yet only 91 but will see if 93 will make a difference. It is not very common here in Phoenix to find 93.