You guys are overlooking the most widely-purchased automotive ripoff in existence...premium gasoline.

Granted, it'* required for boosted cars and higher compression ratios...but the majority of cars on the road are built to run 87 octane. By labeling it "premium" people get the idea that it'* in some way better than regular.

I don't think it'* a myth around here. We have many topics about which engine should be running it and which shouldn't.

Not no mention that most people running premium in a vehicle that doesn't need it are idiots... it is actualy worse for the engine in most vehicle owners manuals it actualy says not to run anything over 87 octane.....

I've never seen an owner'* manual that stated NOT to run higher. Higher octane is simply harder to ignite, so pre-ignition and detonation isn't as likely to occur. SOME L36'* on this Forum have found better mileage with 89 octane than 87. ALL L67'* should run 91 octane or higher. Some modded L67'* here can't even survive on 91 any longer (one of mine included).

Calling people idiots is pretty harsh. Let'* tone that down a bit. Bottom line, if you think you should run premium, try it. If you don't gain fuel mileage, go back down in octane.

My '97 SE (L36) most definitely runs better and gets better mileage using 89. It currently has 170,000 of that octane on it and is running smooth as a top.

That is one example of why it is best to avoid very generalized statements unless you have data or other supportable facts to back them up.

A fair generalized statement might be, "Most cars today are designed to run their most efficient on 87 octane and most owners will not see any gain from using higher octane gas. In fact, since higher octane gas is harder to ignite, using higher octane gas when not needed CAN result in improper burning, leading to increased deposits in the combustion and exhaust systems."

There will be some that argue that those of us who use higher octane than required are simply masking issues in our cars that should be mechanically fixed instead of "covered up" by using other than rated octane gas, we would likely respond by indicating that by using the proper heat range plugs to take advantage of the higher octane we are not harming, but actually being kinder to our engines.

In addition, it is well known that KR or pre-ignition is a seriously harmful problem. A properly maintained engine that still experiences "pinging" under load will often benefit from one grade higher octane. Indeed, as has been shown a number of times both here and on other forums in these cases, a higher octane yields much better mileage, therefore effectively paying for the increase in price.

OK, I'm done...

it'* the 'g box' another junk resistor like thing

http://tunertools.com/proddetail.asp?prod=NLP-G-BoxGold

it says works for 1990 lesabre and that it can improve my shifting....hahaha too bad its not a computerized trans, there plain silly lol.

The IAT sensor has an effect on timing and fuel as they describe.

What do you think happens when the O2 sensor disagrees? The PCM reverts back to what it should. Running too rich is as bad for performance as lean, and you burn more fuel for no reason.

That box has a resistor in it. Send me the $115 and I'll make 5 of them for you to sell to your friends. But it won't work after about 5-10 minutes when your PCM figures out the IAT readings are too low.

did i not say in my post 'junk' and 'resistor' ? i dont want one of those i just happened to come across it on google and t I laughed at it because it said it could make my non-computer controlled transmission shift better

Considering this device has already been listed in this thread, I assumed you were asking if it was the same thing.