Tires for cobalt 195/65x15's whats the best LRR for the buck?

[rmay635703]

How are Vivas? They are $81 here as compared to $93 for ecopias?

[roosterk0031]

I've used up several sets of Goodyear Viva's on Malibu and Stratus, better than the first walmart Douglas Xtrac,s(wore funny) but I think Xtrac's II's are better so far. Price seems high, I think I paid $80 for last 2 Xtrac II's I bought for the Impala and vivas were almost same price. Xtrac's seem to be gone from walmart website so maybe gone. Run of mill average tires, 40-50,000 miles, didn't track MPG enough to say, traction as good as Cobalts OEM. I'd call local walmarts see if they have any xtrac II's left.

I like a big MPG number, but payback is my key, don't think LRR tires pay for themself, and getting more safety aware.

[rmay635703]

Originally Posted by roosterk0031

I've used up several sets of Goodyear Viva's

Remember these are VIVA lrr

[HypermilerAX]

In Europe, from now on, every tire gets a labelling on rolling ressitance, wet grip and noise.
In the size 195/65 R15, Energy Savers and Conti Ecocontact5 are rated B for rolling resistance (0,0066 < Cr < 0,0077).
Bridgestone will present in October the first A-rated tire which has a lower Cr than 0,0066. The first size will be 195/65 R15.

Bridgestone Ecopia EP001 S – First tires with highest “A/A” rating - Car Tires Blog

Toyo should also release an A-rated tire, the Nanoenergy.

I don't know if/when they will be available in the US, though.

[roosterk0031]

Installed 2 Ecopia's on the front of my cobalt yesterday, EP422's $93. didn't take the time to do A B test yesterday. But comparing work trips 49.9(June) vs 47.3 today(50f). Trip home might be more informative as supposed to hit 70f so closer to June driving conditions.

EDIT: mpg's are indicated are via factory gauge and are about 10% high)

[F8L]

Originally Posted by roosterk0031

Installed 2 Ecopia's on the front of my cobalt yesterday, EP422's $93. didn't take the time to do A B test yesterday. But comparing work trips 49.9(June) vs 47.3 today(50f). Trip home might be more informative as supposed to hit 70f so closer to June driving conditions.

Make sure you account for the difference between an old worn tire and a brand new tire. New tires almost always drop FE unless they are vastly superior to the old tire. Less tread usually means less rolling resistance.

[roosterk0031]

I'll run 3 tanks of E0 and see how that compares, to last 3 tank average, but with weather getting colder if I don't loose I probably gained.

I did notice they didn't seem to have as high of PSI swing as the OEM's have cold to warm, will have to track that a little closer. Less swing I think would mean less heat and less RR.