So .. got all my maggie parts coming in the next week or so, and I decided to get myself a tuner as well. Called Mike at 5star (after reading some rave reviews on here) and it was a pleasant experience. Chatted with him a while about what I want to do .. and now the X3 is in the mail. So .. for my question. I'm thinking about the 87 economy (daily driving), 87 tow (pull a house trailer) and 89 performance (for fun) ... what do you guys think? Seems pretty straight forward, only thing I was kicking around was maybe bumping the 2 87s to 89 just to get a little more kick with daily booting around, and towing. What are you guys running? and what would you change if you could? Thanks

 

I would not change them all to 89 - have at least one 87 tune. I would recommend 2 87's - either economy or performance and a tow - and one 91 or 93 performance, depending on what octane is available where you are.

 

Congrats on your tuner purchase.......get the tunes in whatever octane gas you run the most and have available locally......

 

I have 87,89,91 always available. Anyone know if there is a mpg increase in an economy tune of 89 vs 87? And would there be a difference in mpg in the 87 economy vs 87 perf? Gobba ask mike these same questions but thought I would look for ideas here as well.

 

Honestly the performance tunes I've had are as about as good as the economy ones......

 

I would just go with performance tunes and a tow tune

 

If you are concerned about economy, stick with 87 for your everyday and towing tunes - the additional expense of higher octane does not give you a payback. 89 isn't even worth talking about, but if you want to play, a 91 tune would make sense.

 

Got my custom tunes, they are for after my exhaust is done (long tubes, hi flows, x pipe, chambered mufflers) but I have not had them installed yet. Any harm in loading the tune before I have the exhaust completed?