Finished up the residual gas, with about 17 miles left on the meter, so i decided to fill it up with Shell gasoline, which is now "enriched with Nitrogen". Marketing hype? I have always filled up with Shell (before new stuff) or Cheveron Premium, and this Nitrogen enriched option is my first.

I know it's not suppose to give you horsepower, and it's more of a greater cleansing agent, etc, versus its competitors.

To make a long story short, my mpg PEAKED to about 37 MPG, right after I pulled away from the station, and lingered around the low 30's for the 1/4th mile. I have never peaked this high before, and the highest is typically around 24-26MPG, then it normally drops to about 18.x MPG. Even after pushing it a bit from light to light, it is stabilizing around 27-28 MPG.

I am not enthusiastic to see this aggressive peak in MPG, and I would be more worried about the fact that it peaks this high. I need to do some more driving and see where it really stabilizes. So far, I only have about 2 miles on the fresh fill up.

Anyone use the new shell gasoline, yet?

 

You know, I've noticed the same thing with Shell's gasoline. I know they advertise cleaning agents, etc, but I always felt that it was like snake oil.

But the mpg meter on the RDX doesn't lie. If I fill up with that stuff, I definitely notice a bit (3-4mpg) better mileage.

 

Because they don't use Ethanol in vpower (only gas here in Canada that does not use it). I still pump sunoco 94 octane in the rdx, should probably switch with the new merge between petro canada and suncor.

Prelude gets vpower and its happy with it

 

Why would you switch because of the merger?

As for the original post, a few second of spiked mileage is meaningless. Run a few tanks and see if your average goes up.

 

shell continually give me the best mpg in new england....a tank with hess nets a tank about 220-240, shell gives me about 260, same driving conditions, but never lower than 240, hess is a toss up where i actually end up

i guess the trade off - hess, in MA/RI is about 15-20 cents cheaper for 93 on avg than shell...hess was 2.00 93, down the street at shell & mobil was 2.23

 

cuz theres word they are gonna drop the 94 octane....which would mean 91 is the highest available so might as well switch over to vpower.

 

Right, I forgot you get 94 octane in Ontario. We only get 94 through a few Huskies and it's they super performance premium. Their regular premium is 92 and every other company is 91. Crummy.

 

Mine ALWAYS spikes right after I reset it. I've had it in the 40s...but after 5-10 miles it slowly works it's way back down to a normal range. It seems very logical to me - it's sampling and then averaging. The more data points it accumulates, the more accurate it will be. I usually ignore it until I get 30-40 miles on it.

Mike

 

Yeah, 94 was stopped in Mass. a few years ago, so now it's 91 or 93, and as far as I can tell, they all have ethanol.

Interesting that Shell doesn't have ethanol in theirs, I never noticed. It's a bummer that the only local Shell station happens to run .08-.10 cents higher per gallon than anywhere else.

 

every shell station ive been to, says contains 10% ethenol....? maybe its a canada shell thing?

there are still some spots in mass where u can get 94+

 

maybe, at our canadian shell stations (i've seen this posted at all shell stations here), regular contains up to 10% ethanol, mid grade up to 5% and vpower 0%.

I use it yearly, I sometimes fill up with other stations and its a massive drop in numbers especially in the winter, I think in the summer the concentration of ethanol is not as much in all stations here....

 

I beleive in winter, they use more volatiles in gas to help startups, that and colder starts/longer warm up times typically hurt mileage.

 

heres a good read on the new nitrogen stuff

http://www.examiner.com/x-4824-Tampa...iched-Gasoline