Yokohama Avid Envigor and Gas Milease Drop

Hi Aginzu. Are the tires the same size as the stock tires or are they different. Can you post the exact size of your tires (eg 185/65/15 etc)

New tires are a really common cause of loss of MPGs. Sometimes the MPGs return after the tires break in, sometime they don't. It may just be that the new tires don't have quite as lower rolling resistance as the originals.

 

Press them to about 41Lbs. front 38 aft. Your FE should improve. Hal

 

My Prius just changed a month ago. I change to Bridestone Potenza. My AVG MPG drop from 48 to 41. I hope will be increse MPG after tire break in.

 

I still don't understand why people purchase non-LRR tires for a replacement tire. There are many options out there for nearly all weather conditions.

To the OP, the ENVigor is not rated as LRR according to TireRack. Not that you have many choices in that size though. The only tire that looks good is the ContProContact at $93.

 

Thanks for the info aginzu. So it's the touring edition.

Honestly this is such a common problem. "They advertized". The advertizing of any product will never say anything other than great things. It's not that it's necessarily false, it's just that it's a relative thing and it depends what you compare it to. You really need to find independent reviews to get any decent comparative information. From what I can find the envigor is a good performance tire, but compared with the best LRR tires it's only average at best as far as rolling resistance in concerned.

 

I think you can get the Bridgestone Ecopia EP100 in that size. It rated near the very best for low rolling resistance. Several people have reported increased MPG right from the start with this tire. There's also an Ecopia EP 422 in an all season tire (I don't think it's quite as low in rolling resistance but still good).

 

Did they also change the oil? Check for overfill.

 

I have not seen an updated list. The last one was done in the early 2000s so it is not applicable now.

The dB Super E-Spec is Yokohama's flagship tire for LRR and sustainability. The ENVigor should then worse than the dB but the Ecopia EP100 and Michelin Energy Saver A/S both posted higher mpg numbers than the dB. According to those tests and Yokohama's claim for the dB I would assume the ENViror is going to get lower MPG than any of the tires being recommended in this thread.

No matter what tire you get I would expect some MPG loss until they are properly broken in. Who knows, maybe your ENVigors will get much better after 1,000 miles.

Depends on the level of overfill. Mine was overfilled by about 1/2" above the max fill line but I didn't notice a precipitus drop in mpg. Some claim they have experienced a large drop because of this. It can't help mpg. Extra oil being moved around in the engine requires energy.

 

DOH! For some reason I thought they were brand new. I'll scratch them off my list of potential 17" tires then. lol

If you can get them to pro-rate your tires then I would switch out to:

Ecopia EP100
Energy Saver A/S
dB Super E-Spec
ContiProContact with EcoPlus
Hydroedge with GreenX (super high mileage warranty and great in rain)
Assurance Fuel Max

All of these are proven performers and except for two of them (Energy Saver and dB Super E-Spec), they are pretty cheap.

 

What air pressure do you normally run? Hal

 

Try 41, 39! H

 

Yeah I also read that advert and thought they sounded really good. I had a bit of trouble finding actual numbers but eventually I found a review that compared them to 3 other tires and scored them by category (wet performance, dry performance, LRR etc). The Envigor's scored in the 70's for LRR while the Primacy MXV4 scored 100.

BTW. 100 is just assigned to whatever was the best of the four. Most of the tires listed above by F8L will be as good or even better than the MXV4's.

Sorry but I cant find the report again today (found it doing some random googling yesterday). Anyway it had the "Michelin Primacy MXV4" at 100 while both the "Avid Envigor" and the "Michelin Pilot Exalto A/S" had a score of 70 something. The Envior was a few points ahead of the "Pilot Exalto", but I have a consumer report test that only rates that one (the exalta) as a "4" for LRR in a ranking of one (best) to five (worst). So while my information is a bit indirect and convoluted it does seem to indicate that the Envigor is only an average tire when it come to LRR.