MPG drop with Bridgestone Ecopia 422 195 60R15?
At 32k miles, my Dunlops were running quite bare. I live in SoCal and on 10 mile commutes to work, in which around 60% of the distance is highway driving, I'd get around 48-52mpg on the MID with the Dunlops at 38 PSI all around.
I just bought four Bridgestone Ecopia 422's at Costco, sized at 195/60R15 87H as I've seen several folks on these forums raving about this tire size (the Yokohamas in particular). There were one or two reports of the Bridgestone Ecopia 422's here as well, and they were positive.
So I've had the tires for around 30 miles worth of driving, and have them at 41 PSI all around (they felt too sloshy at 33 PSI). It seems like my mileage in moderate stop/go traffic and on the highway has dropped a bit. On the way home today, the MID stayed at 40-41mpg on the highway, whereas it would normally be around 44 or 45mpg (around 68 mph). In the city (moderate stop/go), normally mileage would hover in the mid 30s, but it dropped to the high 20s/low 30s. That said, there was a bit of a headwind today so maybe I shouldn't jump to conclusions.
The max sidewall of the tire is 44 PSI, but I feel like they are still a bit sloshy at 41 PSI all around (measured using an accurate digital gauge). Should I try running a bit higher?
Also, I've never had an alignment done, and the car is 3 yrs old. Could this perhaps help?
Maybe the tires just need to "break in"?
Last edited by Zangetsu57; 04-17-2012 at 12:34 AM.