How much does going to 33's from stock 16" rims change your speedo and MPG estimate?
11-10-2011, 11:37 AM
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How much does going to 33's from stock 16" rims change your speedo and MPG estimate?
I'm trying to figure out how much my speedo and MPG Estimate changed when I went from 16" rims to 17" and 33's. It now say's I'm getting 12 mpg which can't be right. I've driven by a stationairy radar and the best I can tell I'm 3 mph off but will 3mph change my MPG estimation that much?
Last edited by Pcgizzmo; 11-10-2011 at 01:30 PM.
11-10-2011, 03:23 PM
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Yes and yes. Bigger meats will have more rolling resistance if they are more aggressive...worse mileage. HOWEVER...I never take the mpg meter reading from the dash. I always fill to the click, take the odo reading and divide by the gallon qty I just stuck in the tank. Don't trust the dash for mpg. Borrow someone's portable GPS and do a comparison. The faster you go, the more "off" you'll be.