myth?-changing muffler/exhaust gives better gas mileage?
#1
Lexus Test Driver
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So how true is that. My wife is giving me looks after filling up the gas for the first time, and she say 16.9mpg. Yes, some say it'll get better after a few more 100's of miles. But back to topic, can changing the muffler/exhaust reeally improve gas milage? I mean, as long I don't hammer it like I stole it, how much of an improvement of gas milage can I really get? Like 1mpg more? 3-5mpg more? I know I'm wishing on getting 5mpg better, but just curious on that myth...
#2
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I have a exhaust (Borla) and cold air intake (K&N) on my 2003 4runner, V8. I installed them both at 30,000 miles. Before installation I was getting 17mpg as an average. I now average 19.9mpg with 100,000 plus miles. These number may seem low, but are good considering I drive this truck very hard. i am also considering the Tom's exhaust but want to know the benefits
#3
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With my OEM muffler (oh so many years ago) I noticed I would stop at the gas station a little bit later than normal after I switch to my first muffle, an APC Intimidator with was a direct flow. A lot easier to see at high altitude where I am at. However, just switching the muffler out won't do it, you need to make sure you get a better flow rate with the new one.
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