Premium vs. Regular
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From: San Francisco
Originally Posted by radtech' date='Mar 22 2007, 12:44 PM
When the pump says 91 Octane, your actually not getting 91 octane, if you were to do a chemical analysis of the gas that you put into your car you wouldn't have 91. So the ratings at the pump are not completely accurate. Yes it's better then 87.
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From: Rowland Heights 626
Originally Posted by zking786' date='Mar 9 2005, 09:54 PM
I walked in to service my S2000 at the dealership and before servicing the car a tech asked me whether I use premium fuel. I told him no. He was aghast and told me that this is bad for the engine and significantly reduces performance. Is this true? If so, how much.
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From: Raleigh, NC
Hello?.... common sense, where are you? Use 91 or 93 octane depending upon where you live. There is a reason why you need it with a high compression engine, unless you like the sound of your engine knocking.
Use 91 or 93 octane depending upon where you live. There is a reason why you need it with a high compression engine, unless you like the sound of your engine knocking.
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Ask yourself a Q;
Do I like to eat good or shitty food?
Same with your car, feed it regular gas and it will run but it will not perform like it should. So take care of it and it will pay you a nice performance divident.
Do I like to eat good or shitty food?
Same with your car, feed it regular gas and it will run but it will not perform like it should. So take care of it and it will pay you a nice performance divident.
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Choosing Premium fuel is best for our cars. High compression engines should all use premium gas. All gas is the same, at first. Until the additives are added to them to make them what they are. So when people also say that a certain company is better then the other, they are correct. Only because that company is using a different additive then the others. Some premium gas will create more deposits within the engine. It's very confusing, yes.
I'm not sure about in the U.S. but here in Canada, ESSO is terrible. Sunoco and Shell are the cleanest gas if you must say.
I'm not sure about in the U.S. but here in Canada, ESSO is terrible. Sunoco and Shell are the cleanest gas if you must say.
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I always use 91-94 octane in my car because this car is a high performance vehicle which should have the fuel that produces the best results.
However, I'm not convinced that using a lower than recommended fuel is going to absolutly shorten the life of an engine. Even Honda allows for the occasional use in an "emergency" to use the less than recommended octane.
There are no doubt places in this world where high octane gas is unavailable and cars like the S2000 are still sold.
The OM should read-"For best results, use high octane only. For less than 91 octane, your performance may vary".
Since the ECU in modern autos are designed to adjust for changing conditions (pre/post) ignition, it may actually be better to use the exact same grade at every fill -up. Going from 91 to 94 and then back again may not be the absolute best thing you can do for your car. Going from 91 to 87 and then back to 91 is even worse..
IMO- If a driver is determined to use 87 octane then keep it 87 octane and do not vary.
However, I'm not convinced that using a lower than recommended fuel is going to absolutly shorten the life of an engine. Even Honda allows for the occasional use in an "emergency" to use the less than recommended octane.
There are no doubt places in this world where high octane gas is unavailable and cars like the S2000 are still sold.
The OM should read-"For best results, use high octane only. For less than 91 octane, your performance may vary".
Since the ECU in modern autos are designed to adjust for changing conditions (pre/post) ignition, it may actually be better to use the exact same grade at every fill -up. Going from 91 to 94 and then back again may not be the absolute best thing you can do for your car. Going from 91 to 87 and then back to 91 is even worse..
IMO- If a driver is determined to use 87 octane then keep it 87 octane and do not vary.