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Discussion Starter #1
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 hit.

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.

View attachment MPG Costs.pdf
 

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It does depend on how much you drive. I drive a lot, so I can justify a lot.

On the other hand, sensible driving costs squat and works well.
 

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On the other hand, sensible driving costs squat and works well.
This is the most important thing. Example: A lot of people talk about getting better mileage with exhaust and a chip. While this can be attained, it took me quite a while to get over the new power and start driving sensibly, now I do get 2-3 mpg better than before exhaust and chip though.
 

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Jack Ken
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Good driving goes along way. I can get in the wifes Ex and just driving about 20 miles I can increase the average on the LOM by .2-.3 just because of my driving style over my wifes.
 

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COMPUTER BLUE
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To the op

Your miles are really low only around 9k a year?

The national avg is around 12k I thought.. it depends on how many miles you drive in order to justify it we drive a lot more then that About 30-35k per truck
 

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Discussion Starter #6
To the op

Your miles are really low only around 9k a year?

The national avg is around 12k I thought.. it depends on how many miles you drive in order to justify it we drive a lot more then that About 30-35k per truck
Yes, my miles are low, this truck is mostly dedicated to towing. Otherwise, its one of the others that get the miles. All the more reason to figure out if improvements are worth doing

Nice thing about a spreadsheet is that by adjusting the miles driven, all the other numbers adapt automatically. I just used my numbers and thought it might be a point at which others gage their experience
 

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9 k miles a year? Just towing?

Pay the fuel bill and don't worry about it.
 

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professional slacker
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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 hit.

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.

View attachment 26384
what kind of upgrades are you talking about?
I would just do it and not worry about returns cause you do realize that usually with more power comes more foot to the floor = less mileage.
Just do it and enjoy it.
 
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