I wanted to figure out if chasing a certain MPG
increase was sound financially. I came up with chart for my expected use case. I'd attach the spreadsheet so folks could plug in their own senerios but don't have a clue how to within the forum
For initial numbers I figured $3.90 a gallon, 180 normal miles per week, and a few non standard trips. All the miles I'm towing a trailer I figured as non standard miles and seperated them from the other non reoccuring miles. I've guesstimated towing miles will give 2 mpg
So to read this the green line is my current MPG
. If I'm considering a mod which will gain .5 mpg
I can figure a 1 year savings of $120 and a 4 year savings at $480. If I am able to mod and increase MPG
, just move down the table to figure out what the next proposed mod will provide.
With this in mind if the 208 degree Thermostat mod costs me $100 and has no side impacts or costs, with a potential .5 mpg
increase, its a good candidate with a really quick return. However, a $2000 mod that gets me 2 MPG
better will take me something like 5 years just to break even.