09TSXTech

Correct, Shell V power is 100% gasoline, whereas Ultra 94 consist of 90% gasoline and 10% ethanol.

Store energy is another term for energy density. There is around 76,000 BTU in one gallon of ethanol, and around 116,000 BTU in one gallon of gasoline.

ed_423

http://finance.yahoo.com/family-home...ries-e-article

another article. this one about saving gas since gas prices are smoking weed right now.

tsxuser

I use 93 since first day of owning the car. I still experience pinging issue. I even went to dealer to have a TSB done. (update software and replace knocking sensor), but none of them help. My engine still ping. most around 2K RPM. Is anyone still have engine ping like me? I don't know Can I go back to dealer to let them have a TSB done again.

the_razor

Will that really fix it? Mine does it too little bit and it is mentioned in the TSB that certain pinging is accepted. But again I am no any car mechanic so I can't confirm just going by the TSB facts. By the way does V6 ones also ping? Regardless I love my tsx specially on highway drives the car feels good really enjoy driving. Kinda early but Only one wish to santa - bring tsx with SH-AWD :P

the_razor

Thank you for the lesson...in conclusion Shell V Power 91 is better?