Thanks for some backup on this finally. My dad was a VP at Amoco for a few years and has told me this many, many times.Originally posted by lo bux racer@Dec 22 2004, 10:47 PM
They all come from the same base stock, the only difference is the additive packages. I run Arco all the time except in my Supra because I run 100 octane in it. The best thing you can do is use an injector cleaner like Red Line, Chevron Techroline (Pro Gard or Clean Up), or BG's BG44K (expensive but really good). If you want to be extra nice, switch brands every 2k miles or so to clean up the residue from the additives with another brand's additives. The additives are different.
to me 2 mpg is a little.. when i hit 5mpg or better is when i would smile..Originally posted by lo bux racer@Dec 24 2004, 10:00 AM
2 - 3 mpg is not a little, that's a 10% improvement. 10% is a LOT. How carefully do you monitor your mileage?
I ran two tanks of Shell in my tC over the last two weeks. Results? 1.6 mpg decrease in efficiency over the same route at the same speeds. Arco wins for economy, I got 29.2 with Arco 87, and I got 27.6 with Shell on the second tank, filled from less than two gallons left. Maybe it's CA RFG, but I'm definitely not getting the same results.Originally posted by sciontc_mich@Dec 26 2004, 07:39 AM
to me 2 mpg is a little.. when i hit 5mpg or better is when i would smile..
monitor carefully? everytime i fill up i've been calculating the economy since I got my tC .. shell typically returns on average 2-3 mpg better (other stations i've tried. mobil and amoco/bp).. i have tried it with the tC and other cars i've had, so yes shell really does give better fuel economy.. have had friends try shell on their minivan and their mpg also jumped about 2 mpg.. they do have a white paper (research paper) on their additive package on their website.. they claim better fuel economy and well they're not lying.. i've been trying this on other cars for about 2 years now.. and it still holds true in the tC..