New wheels and tires for better gas mileage??
I don't very often post here, however, i'd like to buy some new wheels and tires for my old PA.
Currently I am running fat 215/70r15 generic brand tires on 15 by 6 inch rims.
I remember when I switched to the bigger tires from the stock 205/70 r15 I saw my gas mileage take a bit of a hit. I lost about 50-80 kms a tank. Currently, I get 450-470 kms to a 53 liter fill up on average.
Last winter was even less as I had the snow tires (215/70 r15) and the fuel is blended differently.
I was thinking of finding some nice 16 inch wheels, and some new tires, p225/60 r16. I would like to know if this will improve my mileage or reduce it? I know it is a pretty common tire size as most bonnies, impalas and most GM'* i've seen wear this size. Impala'* actually seem to get awesome mileage with the base 3.4. They are also lightweight (alum frame, knuckles, etc)
It is either upgrade to the 16'* or get some new tires in the stock size 205/70 r15..
Also, what are decent tires? I'm thinking of michelin harmony or similar as I've heard michelins are designed for economy. I was also thinking of BF goodrich tires too, maybe the TA'*
Before anyone mentions it, yes i do coast as much as possible, i'm easy on the gas, keep the car in OD, and never travel over 100kph. If i drive any-more like a grampy (i'm 22) i'll prolly get pulled over.. Most driving is highway too.
2009 Pontiac Vibe AWD 2.4
1993 Buick Park Avenue 3800
1984 Chevrolet Citation 2.5 liter four.