Are you guys aware that Honda recommends only using "Top Tier" gas in
their cars? Same goes for Toyota, BMW and GM. It has to do with the
amount of detergent additives. Here's an excerpt from Car and Driver
"Gasoline is gasoline whether you're in Florida or California, right?
Wrong. There are different concentrations of elements like sulfur, for
example, that change the chemical composition of a batch of gasoline.
Since it's not known what causes these deposits, gasoline retailers
can't be penalized for selling defective fuel. So to keep the deposits
from forming in the engines, you need detergents added to the fuel.
But how do you know which brands have the right kinds of detergents
and additives to keep your injectors clean? Until recently, that was a
tough question to answer, but in 2004, representatives from BMW,
General Motors, Honda, and Toyota got together to specify what makes a
They called their agreed-on standard "Top Tier" and published it for
the various gasoline retailers to voluntarily meet. So far, eight
companies currently sell gas that meets the Top Tier standard."
If you want to see the entire article, go to
In my research on this, I read somewhere that when the federal govt.
adopted minimum standards for gasoline, some vendors dropped their
standard to meet the federal minimums. Around that time, the Top-Tier
I just checked with the service manager at my local Honda dealer. He
was definite in his endorsement of using only Top-Tier gas.
There are some who don't think much of this "top tier" designation,
but if the auto manufacturers are recommending this, I'll listen to
the experts. Times have changed, and so I guess has the old notion
that "all gas is the same".