So while your past history (you did say retired) is actually very impressive for what you did it does not enter into the end product of what you contributed your knowledge and real-world diagnostics and testing how they affect some of the few things I mentioned.

 

Okie Dokie… I am still waiting to hear how 87 octane disables a vehicle’s monitoring sensors…

 

-+ 25 cents -87-89 / +25 cents -89-91
and 87-91 - + 50 cents spread - my tank holds 15 g so its about $7 more but i usually fill up at 1/2 tank so for another $3 - i dont mind - the base price is low and when you get over 30 mpg - well its a fractional upgrade for what i see as a big benifit- freeway I can usually get about 500 miles on one tank -

 

Where I live the Chevron 87 is $2.56 and their 93 is $3.36
That's for the ethanol gasoline.

 

Hey BoomerZoomer that's an impressive past career with fuel. Very few people know that a special blend of fuel (which is unavailable to the public) is used to determine fuel economy and emissions. Kinda like cheating in my books.

 

i never said it did!!!!!

 

Thats not what he said....and it was open ended!
The CCA and EPA and California (LOL) would have a different story if that were true!

 

Nobody told me this, but looking at the specs I would say the manufacturers requirements for their test fuel wasn’t better than consumer fuel, and actually was probably worse. One example is, we even added sulfur to their fuel. So I am assuming the test fuel was kind of a worse case scenario… in other words, the real world numbers consumers would produce would be no worse than required by government.

 

"enables monitoring sensors reporting to the ECU" is what you said premium gasoline would do.
logic would dictate the sensors were previously disabled, to be enabled by the premium fuel.
logic would also dictate the 87 octane gas contributed to the disabled sensors.

occasionally using premium gas seems like occasionally using birth control… IMO
if I desired the extra fuel detergent that premium gasoline provides, I would simply add a bottle of it to the gas tank around every oil change. But I purchase only 93 octane gasoline, so no worries on my end.

 

Ok your age is showing... (joke I am likely older or close to your age believe it or not).

Sulfur in gasoline will harm a *Catalitic converter. A vehcle *using it would not only run very poorly but fail any tail pipe emission sampling. So either you are just really old and your education in your field of studies dates back to the 1960s ,1970s and early 1980s or you meant to say before CATs were used?
I also have many friends and have posted this that work for various auto manufactures a couple are actually head of the powertrain development departments (1 now retired was the main guy for Chrysler for almost 2 decades.). I can assure you if an special fuel was used they would have mentioned it to me knowing how I am about fuels specifically for my vehicle I professionally have raced for decades in NHRA and SCCA.