Originally Posted by legorreta

I am rather confused to where the heck your coming up with this assumption that mpg tools are retarted.

Lets say you get 10mpg and lets compare at driving a thousand miles

that comes out to 100 gallons of gas used because as you see
1000/10 = 100..
Which I am sure you can figure that out.. Let's say that gas costs an even 3 dollars.
3 X 100 = 300 dollars in gas

Lets say you now did a mod.. like you said.. it cost 350 dollars on whatever it may be.
1000 miles / 13 = 76.92 gallons of gas.
76.92 X 3 = 230 + 350 (for the mod) = 580

Now your 350 dollar mod paid off 70 dollars for every thousand miles. (incase you dont see why its because of this.

300 dollars at 10mpg for 1000 miles
230 dollars at 13mpg for 1000 miles

300-230 = 70
Lets say you drive on average as the normal person.. Isn't that 12 thousand a year?

12 x 70 = 840 dollars saved for 12 thousand miles
840 - 350 = 490


So in one year you saved 490 dollars. Now I know this is a bit extreme because 3mpg for 350 seems a bit unreal (if its possible tell me where and ill get it).

Say you do the gryphon cts with canned tunes bla bla bla and get 1-2 mpg increase (lets say 1, take the lower number to make it look less jaded.. their priced at 630 or so?) and spend 1000 dollars on the whole exhaust etc setup so we get 1-2 mpg more (as stated in prior post on this thread). Lets say you regear too because after your lift etc your tires cut down your mpg and we all need lifts.. Thats what 1-2k? (I haven't looked into prices on it so im clueless)

So now your saying
1000 + 630 + 1500 (went for middle number) = 3130
spent on three items which you save maybe 4mpg.

So lets start over..

10 mpg at 12 k miles a year comes out to 3600 dollars

at 14mpg with 12k miles you spend 2571

3600-2571=1028 saved in one year

In other words in 3.5 years you pay it off..

thats if you drive 12k. I go about 18k a year so for me cut off a year.

I understand that regearing isn't just a mpg mod but more so better for your truck with bigger tires etc and many other things.. In this example im using it as a mpg mod.

you said 1500 dollars. Instead of 3 I did 4mpg in my calcs and had a cost of 3600 dollars which atleast double the cost of what you said.. You were willing to bet 15 years to pay it off. With math I proved it took for someone like me little over 2 years.

Also if I did get 2mpg from the gryphon + 2mpg from the exhaust headers etc setup + 2mpg for regearing i would save 6mpg

Which means it would even take less time to pay off that cost..



If I just overwhelmed everyone with my numbers I apologize.. Hangovers and math dont go very well..

But seriously.. How do you figure 15 years?? I understand things like tires need to be replaced every 3 years or so.. But the 3 items I listed, I have hard time thinking the same..

Originally Posted by folkxrock

I have ordered a Gryphon tune, so I will see if that helps. I will try exhaust down the road - when my factory setup falls off. Why pay to remove an exhaust system when nature will do it for free