It's not funny at all. It's been long known that cars that aren't designed to run on 93 is just wasting money and robbing themselves of power. Google search does wonders.silrturbo said:i've read a post on di.net regarding how our cars require 87 gas (and 89 is ok) but NO 93 lol
i've been using 93 for 2 weeks, but my car starts to lag. i changed back to 87 and now it runs smoothly. weird.....
Quite possibly the best marketing hoax in America!! By calling it "premium' and charging 10cents per gallon more the oil companies have created a the myth that it is better for your car, when the reality is that most cars run better and pollute less on 87 octane fuel. Few engines actually require 93 octane gas and most will perform worse with it. If you just like spending the extra money you can fill up with regular 87 octane and throw a handful of dimes in the parking lot at the gas station, this way your car will run better and the guy who is supposed to fill up the paper towel thing and the window washer buckets will do it more often so he can pick up all the money in the parking lot, This way you can at least get some benefit from the extra $ you spend!! :grinyes:smc1377 said:It's not funny at all. It's been long known that cars that aren't designed to run on 93 is just wasting money and robbing themselves of power. Google search does wonders.
It won't and you could actually damage the car by using E85. "Flex Fuel" cars can use either regular gas or E85. I've posted some stuff on this a lot lately. Search for E85 and my name and you'll find some of my posts and links. There is so much "buzz" over this E85 because of the rising costs of petroleum. But what they fail to mention is the fact that most vehicles on the road today can't use this E85. they make it like its gonna solve everything overnight, when, in fact, its several years down the road. And for those who can't afford to buy a new car or a used "flex fuel" one, they are still stuck paying out the ass for gasoline.OfficerVILLA said:I wonder if the Treps will work with E85, but I have wait a few months to find out when I com e back from duty.
We've had so many threads on this topic in the past, I'm not gonna go digging up all the research, but if your car is not designed to run on 93 octane, it DOES hurt performance. 93 Octane gasoline is designed for higher performance engines with high compression ratios. In order for these engines not to knock, they require a higher octane gas that will BURN SLOWER.jfsram said:I do have a hard time believing lag or not running smoothly is fault of the 93 octane.
"Hits the nail on the head". right on the money. There is no benefit from using higher octane in an engine designed to run on lower octane. There is, however, exceptions. A higher mileage engine, that has some carbon built up over time, may need higher octane. The reason for this is simple, the added carbon in the combustion chamber effectively raises the compression ratio and it is not uncommon to start getting a pinging from it when staying with the regular gas its always been running.[email protected] said:We've had so many threads on this topic in the past, I'm not gonna go digging up all the research, but if your car is not designed to run on 93 octane, it DOES hurt performance. 93 Octane gasoline is designed for higher performance engines with high compression ratios. In order for these engines not to knock, they require a higher octane gas that will BURN SLOWER.
So in effect, by you using 93 octane gas, you aren't burning up all your gasoline in every detonation thus wasting gas and robbing yourself of power since you literally didn't get the most bang for your buck.
Seriously, like I said, a google search does wonders.
Well, I'm not quite sure where the "burns slower" thing originated over the years. Its just one of the ways it was explained to me. I guess the correct way to state it is like you said, it resists detonation. I understand some of the concepts of what octane does even though I say it incorrectly (burns slower). I think that rose as a general explaination. Its a lot easier to explain "it burns slower" than "it resists detonation" to someone that has no idea what you mean. Because then the next question is "well, what is detonation?" and then you're in a all day seminar trying to explain the internal combustion engine!jfsram said:Yes high octane burns slower and it not required for our cars. Agree 100%.
The part I don't see is it running poorly because you put in fuel that will "burn slower".
It does not burn slower, it resists detonation. In other words it will wait for the spark from the plug and resist combustion from compression.
Anyways read this part again, I agree our cars do not require high octane but I've tried several tanks of each and find no improvement in mileage and quarter mile time/mph were within 1 tenth of a second and less than 1 mph. Minor.
As for idle quality, smooth with 87, 91 or 94.