Ninety five percent of my gas is Top Tier and ninety five percent of that is Costco, Maybe two percent QT.
My understanding is that ethanol is in itself a great cleaner in the fuel system and that there usually is not much detergent added to it.As far as I know, that would be required to have the EPA minimum. However, the places where I've seen e85 it was specifically noted as being "unbranded" or of a specific brand. For example, there's a Valero station near me, but the E85 pumps are separate and note that they're marketed by a company called Propel Fuels.
Not sure what happens with some places that sell branded E85 like Shell where the company is considered Top Tier. However, E85 isn't marketed as "gasoline" so that might not require anything beyond the EPA minimum.
Shell ClearFLEX E85
Shell ClearFLEX E85 was designed specifically for Flex Fuel Vehicleswww.shell.us
EPA requires a minimum amount of detergents regardless of E0/E10-15. E85 can have detergents but they have to be compatible, some of the gasoline based ones have solubility issues in ethanol.My understanding is that ethanol is in itself a great cleaner in the fuel system and that there usually is not much detergent added to it.
where in Illinois are you located?...here in the ChicagoLand suburbs I see Top Tier labels at Costco (where I buy my gasoline)...I'm in Illinois and Top Tier is never mentioned at the stations.
Central Illinois. No Costcos.where in Illinois are you located?...here in the ChicagoLand suburbs I see Top Tier labels at Costco (where I buy my gasoline)...
Bill
TT only.So, I had been using a generic gas, mostly Hess and Speedway for many years because of the reward points. I notice that on the car, Mazda GDI turbo that I had to run FI cleaner through it about every 6 months because I noticed a rough idle and slight hesitation. After a couple of tanks with the cleaner all back to normal. Then a couple of years ago I got a new truck, Chevy GDI and got better fuel rewards at a station that had Top Tier fuels. I took both the car and the new truck there and have not needed to add any FI cleaner, it’s been almost two years. Both vehicles, Mazda 196K and the Chevy 18K run great and have not noticed a rough idle or hesitation or any other symptoms of slightly clogged injectors. They both run great. So, I do believe that the Top Tier fuels work as intended. I will continue to use them. Anybody else?
garyoNC