I added the Air Raid Jr., got new wheels and tires (same size as before) and did the SLP resonator delete and now my MPG went from about 16 down to 13.5. Would any of this have caused it? The way I drive has not changed. I considered maybe they switched to winter blend fuels but not sure it would drop that much not to mention I live in FL. On top of that the new tires are LRR tires
Few Changes and MPG down
- Thread starter byrds6
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
May need to consider a tune. The Intake tube has caused a change in airflow.
CrashTestDummy
Full Access Member
Hmm, after I installed the MIT on our '10, I noticed that the mileage actually went UP a bit. I'd blame the wheels/tires. Just because they're the same size, doesn't mean they're the same weight. Adding weight to the wheel/tire combo will affect performance significantly.
But yeah, I recommend a tune, too.
But yeah, I recommend a tune, too.
Keanen55
Full Access Member
I know that after I add any performance MOD's to my vehicles, my gas mileage goes down because my foot gets heavier! Then goes back up after the new factor wears off!
Shouldnt the air flow remain the same? The throttle blade doesnt open any more because of what tube is in front of it.
I would like to think these rims weigh a bit less since there is less of them. Granted I dont know what they are made of vs stock rims but the stock were a bit thicker than these for sure. I guess it it doesnt change shortly on its on then Ill throw the stock intake tube back on and see what happens with that. Someone did tell me though that the fact the old tires were more than half worn down that putting new ones on it alone would change the mpg because the tires are now bigger because of full tread. Is this true?
I would like to think these rims weigh a bit less since there is less of them. Granted I dont know what they are made of vs stock rims but the stock were a bit thicker than these for sure. I guess it it doesnt change shortly on its on then Ill throw the stock intake tube back on and see what happens with that. Someone did tell me though that the fact the old tires were more than half worn down that putting new ones on it alone would change the mpg because the tires are now bigger because of full tread. Is this true?
CrashTestDummy
Full Access Member
Yes, you're using the same amount of fuel, and according to the odometer, going less distance, so your MPG will look like it's suffering.
We put larger wheels on our '02 GMC. I haven't reset the wheel ratio yet, so our mileage immediately went from upper teens/low-20's to mid-teens no matter what.
And it's a diesel, so it won't be affected by the winter/summer fuel blends like gas engines are.
We put larger wheels on our '02 GMC. I haven't reset the wheel ratio yet, so our mileage immediately went from upper teens/low-20's to mid-teens no matter what.
And it's a diesel, so it won't be affected by the winter/summer fuel blends like gas engines are.
