HIGH OCTANE FUELS

[Henry G.]

There is so much opinion and mis-information in this thread its ridiculous. Yaris Hilton is the only one giving facts IMO. 40 years ago they made muscle cars that had 10.5:1 CR and they required 98 octane fuel or higher. I know, I had one, a 1970 Mercury Cougar with the 4V 351 Cleveland engine.
How is it that today's Yaris and many other cars can run the same CR and not ping on 87? Computers and electronic ignition systems, knock sensors and micro-processors that constantly change the ignition curve. Run what you want, 87 is probably fine for most Marvin Milktoast drivers here with this roller skate car. HOWEVER, ignoring the driving conditions, driver habits, engine loading, engine temp, outside temps and humidity and making another "youre just wasting your money 87 octane is fine" ad nasuem post is another way of making your self feel better about putting Valero crap gas in your ride. Please dont knock someone who puts a quality oil or fuel in their car, and we wont call you a cheap bastard who rationalizes his actions. Toyota and other manufacturers know if they advise mid grade and premium fuel use for a cheap car like this they will lose business from all the tightwads, think about it.

[Marthos]

Originally Posted by Henry G.

There is so much opinion and mis-information in this thread its ridiculous. Yaris Hilton is the only one giving facts IMO. 40 years ago they made muscle cars that had 10.5:1 CR and they required 98 octane fuel or higher. I know, I had one, a 1970 Mercury Cougar with the 4V 351 Cleveland engine.
How is it that today's Yaris and many other cars can run the same CR and not ping on 87? Computers and electronic ignition systems, knock sensors and micro-processors that constantly change the ignition curve. Run what you want, 87 is probably fine for most Marvin Milktoast drivers here with this roller skate car. HOWEVER, ignoring the driving conditions, driver habits, engine loading, engine temp, outside temps and humidity and making another "youre just wasting your money 87 octane is fine" ad nasuem post is another way of making your self feel better about putting Valero crap gas in your ride. Please dont knock someone who puts a quality oil or fuel in their car, and we wont call you a cheap bastard who rationalizes his actions. Toyota and other manufacturers know if they advise mid grade and premium fuel use for a cheap car like this they will lose business from all the tightwads, think about it.

Got any pics of that coug? My 3rd fav car!

Here is my 2nd Fav!



I have some experiance with super/98 Octane, this car needed it.

This car doesn't.