Another Mpg Thread?!?!?!?! Seriously?
Evolved Member
Joined: Mar 2003
Posts: 2,080
Likes: 27
From: Southern California
I knew that, but is the weight going to make THAT much of a difference in otherwise identical driving? I suppose I have my answer, but I didn't expect it to change as much as it did. Some statistics:
Yokohoma Advan A046, 235/45ZR-17
Tire weight: 25 lbs.
Overall diameter: 25.3"
Revs per mile: 822
Dunlop Direzza Z1 Star Spec, 235/45ZR-17
Tire weight: 27 lbs.
Overall diameter: 25.4"
Revs per mile: 817
I got my Dunlops installed just after I hit 25,000 miles at the end of this past October. Since then, based on my Excel files, I've driven 2,807.2 miles and used 138.512 gallons, which equates to 20.27 mpg from 10/29/2009 to 1/21/2010 (the last time I filled up). Looking at the same period last year (to also take into account the slightly different weather during that span), I had driven 3,020.6 miles and used 133.795 gallons, equating to 22.58 mpg. Would tires that are two pounds heaver at each corner really have that much of an effect?
Don't get me wrong, I don't mean to sound like I'm complaining about it, as the higher fuel consumption doesn't come close to denting my income. I'm just getting used to it since it's odd to see my low fuel indicator come on at around 230 or so, which contrasts to it having come on at 250 or so before doing practically the identical 9-mile commute to work (less than a third of it being through city streets and the remainder of it being on the freeway, never with traffic) over the past two years.
Yokohoma Advan A046, 235/45ZR-17
Tire weight: 25 lbs.
Overall diameter: 25.3"
Revs per mile: 822
Dunlop Direzza Z1 Star Spec, 235/45ZR-17
Tire weight: 27 lbs.
Overall diameter: 25.4"
Revs per mile: 817
I got my Dunlops installed just after I hit 25,000 miles at the end of this past October. Since then, based on my Excel files, I've driven 2,807.2 miles and used 138.512 gallons, which equates to 20.27 mpg from 10/29/2009 to 1/21/2010 (the last time I filled up). Looking at the same period last year (to also take into account the slightly different weather during that span), I had driven 3,020.6 miles and used 133.795 gallons, equating to 22.58 mpg. Would tires that are two pounds heaver at each corner really have that much of an effect?
Don't get me wrong, I don't mean to sound like I'm complaining about it, as the higher fuel consumption doesn't come close to denting my income. I'm just getting used to it since it's odd to see my low fuel indicator come on at around 230 or so, which contrasts to it having come on at 250 or so before doing practically the identical 9-mile commute to work (less than a third of it being through city streets and the remainder of it being on the freeway, never with traffic) over the past two years.
30.6 mpg - 158,xxx on my evo. '03 Evo 8 just full 3" buscher racing exhaust, injen piping K/N new filter, 5w-20 castrol oil, 235/40/18 tires all inflated to 32 psi, had A/C part of the time, mainly highway driving, maybe 20-35 miles of city driving.
:]
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Last edited by EVOEvolved; Sep 23, 2015 at 09:37 AM.
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