New lawsuit against Cummins/FCA

AT and MT tires have more rolling resistance and the tend to weigh more than highway tread designs, so they definitely impact mileage. But in return you get better off road traction and snow performance along with a tougher tire, so to me the tradeoffs are well worth it.

Chris yes the Michelin tires are fully siniped. Have to say they grip the road in wet conditions like none of the other tires I tried. I tried Cooper's and Yokohama's both had lossy wet traction.

Don

Me Again wrote:
Did you have the new tires siped? Or are they highly siped OEM. Siping will kill mileage. Chris

Tool Ol Les Schwann tactics.

ShinerBock wrote:
I wonder how bad this will effect the GM's Isuzu Duramax law suit.

You mean there is another one? I have only heard of the FCA one. In The EU , they are investigating emission cheating by FCA as regards Jeeps

Did you have the new tires siped? Or are they highly siped OEM. Siping will kill mileage. Chris

travelnutz wrote:
Mileage probably didn't drop at all because the new tires have more tread left with means a larger diameter tire which results in fewer revolutions per mile driven being shown on the odometer for the distance driven divided by the fuel used which then will show less mile per gallon numbers. Still traveled the same distance with the worn tires which had turned more times per mile due to the now smaller worn tire diameter to the road. Easily can make a 3%+ difference in hand calculated MPG's just like going to a larger diameter tire sixe does in altering perceived MPG's or actual speed driven.

That could have played some part however the truck was making 27/28 MPG @ 77 MPH just before the tire change and now I'm down to 24/25 MPG. We just did a trip to Cocoa Beach and the best I could get was 25 MPG and in the Mountains it dropped to 23 MPG :M . But the truck would make that 27 MPG @ 77 MPH new so not sure what has caused the drop in mileage.

I called GDE and they told me they have seen this on other trucks they do tunes on also, like the Colorado diesel they are testing.

I changed my OEM Goodyears to Cooper Discoverer A/T3s and lost almost 1 mpg. Maybe the outside diameter played some role, but in my case, I also think the Coopers, being ATs probably have more rolling resistance.

Mileage probably didn't drop at all because the new tires have more tread left with means a larger diameter tire which results in fewer revolutions per mile driven being shown on the odometer for the distance driven divided by the fuel used which then will show less mile per gallon numbers. Still traveled the same distance with the worn tires which had turned more times per mile due to the now smaller worn tire diameter to the road. Easily can make a 3%+ difference in hand calculated MPG's just like going to a larger diameter tire sixe does in altering perceived MPG's or actual speed driven.

How many people have changed their factory tires? I went from the cactory Goodyear's to Michelin's and my mileage dropped by 2/3 miles per gallon! So good luck winning any lawsuit for loss of fuel mileage.

Don

goducks10 wrote:
I almost got Rammed buy a Dodge the other day. :)

Sounds like a personal problem! :W