I have an 07 5.7 DC:I have had success with a K&N air filter. My mpg have improved from 15.25 to 16.8 all city driving. People have had mixed reviews of K&N products on this site but I have not had any problems with mine.
I would LOVE to be paying $2.79 for 87 octane. Where I live it is $3.05 now.Even if it did, which is questionable, you'd need to see a roughly 11% gas mileage increase (say from 15 mpg to 16.6 mpg) to make up for the increased cost (from $2.79 for regular to $3.09 for premium in my area). And that's just to break even.
I just checked K&N's website and they have not made a drop-in filter for the 07 Tundra yet. The one I use is simply a drop-in replacement for the OEM filter; no modifications needed. One thing to keep in mind is that you have to drive about 3000 miles before you will start to see improvements, at least this has been my experience with them.I have an 07 5.7 DC:
Do you know the part number for the filter?
Does it require any modifications?
thats it? ****, here is cali, it's now at 3.35. **** sucks.I would LOVE to be paying $2.79 for 87 octane. Where I live it is $3.05 now.