Much has been written and debated on this subject, however, the fact remains that Honda reccomends that we use Top Tier Gas. For an explenation of what this means you can visit http://toptiergas.com Where I live in NYC, only top tier gas available is Shell. I decided to contact Mobil and Sunoco for their response, but only Sunoco replied (but no mention of MMT additive) and I am posting their reply.
Thank you for emailing Sunoco with your detergents inquiry.

I got in touch with some of our fuel experts, who replied that "random addition of detergent doesn’t always make it better – we‘ve tested detergents in our own gas to determine treat rates, etc."

They also made the following points:
• We are not on the Top Tier List and have no near-term plans to be on the list.
• The Top Tier program can provide some incentive for some fuel companies to do adopt higher detergent levels than they may have been utilizing.
• We have chosen to do our own testing of our own fuels and additives to determine our detergent level. That level is significantly more than the government minimum required level.
• Testing is important – too much detergent can be as bad as too little.





I personally try to use a top tier fuel at least every second tankful, cheaper than buying Techron later.:naughty:

thank god citgo isn't on that list

thank god citgo isn't on that list
Huh?:confused:

Huh?

Where have you been living?

Where have you been living?
The following is a list of Top Tier Retailers, in NYC ony Shell is available:

QuikTrip
Chevron
Texaco
MFA Oil Co.
Conoco
Phillips 66
76
Entec Stations
Shell
The Somerset Refinery, Inc.
Kwik Trip / Kwik Star
Aloha Petroleum
Tri-Par Oil Co.
Turkey Hill Minit Markets
Mileage Stations

is shell same as BP?:dunno:

:dunno:

is shell same as BP?:dunno:
Nope, don't think so. BP stands for British Petroleum but now using only the initials, is the world's third largest global energy company and Shell Oil Company is the United States-based affiliate of Royal Dutch Shell, a multinational oil company ("oil major") of Anglo Dutch origins.

I'll go out of my way to buy Chevron, and now Texaco, because of Techron.

I run 90% Sinclair real gas. No corn squeezins. I will not purchase ethanol fuel for the car. Means I won't go to certain parts of the country. :) Yeah!!!!

Any name brand gas will work,,, and work well. Remember folks. There is no lead in the fuel. Thus less chance of deposits and carbon build up. Go to a fuel terminal and watch all the trucks get filled from the same tanks and supply lines. Or have you ever wondered why a Chevron truck is at a Shell station dropping a load?

Its gas,,, buy it and burn it.

Actually the trucks do fill up with the same gas, but then they pull up to a different station and push a button for whatever their company is, and it adds the different additives to the fuel.

+1 Additives make the difference. Mobil's advertising shows only the premium gas "Drives your engine clean", however, it is no longer available for regular grade. In the NY metro area only shell qualifys:dunno:

I also go out of my way to find Chevron Mid Grade Gas.

Terry Dyson, auto chem expert (www.dysonanalysis.com) recommends Shell over the others when available, he likes their additive pack the best.

I find the biggest difference is between summer and winter blend fuels. Our 03 Accord I4 seems to be very sensitive to the seasonal blend, our fuel economy for highway driving drops at least 7-10% in the winter. Ethanol blended in reduces MPG also. The best fuel economy runs I have had on the highway (over 40 mpg) were on gas from Sheetz and BP in western PA on my way back to NYC.

We use Fuel Power (additive) in our gas to help improve combustion efficiency and provide a little bit of lubrication in the cylinders.

My friend used to work at BP and he told me Shell has the best additives ;)

I also go out of my way to find Chevron Mid Grade Gas.

Just wondering why? If the PCM is tuned from the factory to ideally adjust timing assuming 87 is being used, then adding 89 does not overly advance the timing. The PCM can only retard timing based on knocking but it cannot determine that you are using higher octane gas than is recommended and, in turn, advance the timing further. When you run 89, the PCM controls as if you had 87 in it yielding no difference in performance/efficiency (maybe a nudge better cleaning of the internals though). Maybe new PCMs are designed such that is tries to advance the timing to always be on the cusp of knocking but I don't think so.

However if the PCM is designed to run wth 91 then running with 87 will cause the PCM to retard the timing yielding a less efficient but non-knocking engine.

Just wondering why? If the PCM is tuned from the factory to ideally adjust timing assuming 87 is being used, then adding 89 does not overly advance the timing. The PCM can only retard timing based on knocking but it cannot determine that you are using higher octane gas than is recommended and, in turn, advance the timing further. When you run 89, the PCM controls as if you had 87 in it yielding no difference in performance/efficiency (maybe a nudge better cleaning of the internals though). Maybe new PCMs are designed such that is tries to advance the timing to always be on the cusp of knocking but I don't think so.

However if the PCM is designed to run wth 91 then running with 87 will cause the PCM to retard the timing yielding a less efficient but non-knocking engine.

Because some people think they can feel a difference between mid grade or premium vs. 87 in their car.

I only put BP or Shell in the car, and a few times Phillips 66. Does anyone know what gas Walmart, or Jewel uses in their pumps?