Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
That said, I don't really care what brand I buy, as long as it's the lowest price. I use GasBuddy to track down the lowest gas prices. There's only a few things I refuse to do:
1) I pump the gas. End of discussion. I don't trust someone else doing it.
2) I try to avoid gas stations in the slums, unless the price differential is significant (greater than 20 cents per gallon).
My car is over 10 years old, and I have read many stories about detonation problems inside the engine if you run anything less than 91, also the owner's manual says it's required. But you're right on most modern cars it's just recommended, for maximum performance and efficiency. But if it hurts your MPG's to get lower octane fuel, why not pay the extra few bucks and get the higher octane and increased gas mileage?
Not even a consideration for me. I bought a high performance car, and I'd be foolish to hinder that performance to save a few bucks per tank. Whatever is recommended is what I'll run in anything I drive.
Indeed. I have a V-12 and higher octane is an absolute must.
I know what you drive and it isn't how many clys you have it is the for real high compression... In winter time there IS more 02, and you might get better power and economy with the next lower grade and better starts too.
But only and i mean only if there is no ping.... if the engine sets off the ping sensor you will know it, because the engine will stop for a split second each time it pings..... BMW engines have these sensors and they know ping before the human ear can hear/feel it.
Depends on the vehicle.
From perineum to reg. to #2fuel oil
(Generally speaking, diesel fuel ignition quality is not measured in octanes but if it was it would be around 15-25)
All of our fuel came from the same refinery, transported by pipe line to the fuel depot. Where the propriorty mix is added and trucked to the station.
Last edited by snofarmer; 11-17-2012 at 10:23 PM..
That said, I don't really care what brand I buy, as long as it's the lowest price. I use GasBuddy to track down the lowest gas prices. There's only a few things I refuse to do:
1) I pump the gas. End of discussion. I don't trust someone else doing it.
2) I try to avoid gas stations in the slums, unless the price differential is significant (greater than 20 cents per gallon).
3)
Don't ever go to Oregon. It's against the law to pump your own gas.
My car has a compression ratio of 9.4:1. I run 87 octane because it's all I need. I occasionally borrow a family members car and put in 91, but it has a blower, so it needs the extra knock-resistance (and the owner's manual states as much).
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.
Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
compression ratio around 25:1 
