Premium Gas

[Black Yaris]

Originally Posted by churp

Hey Pavel....you're great!!!

Haven't met many like you, but all I can think of is you sittin at home gettin under peoples skin and just laughin!!

Carry on.

1 vote to ban you from the site just for that comment

[acrbill]

Originally Posted by Black Yaris

1 vote to ban you from the site just for that comment

Just what any site needs. Some 8 year old who gets off by pissing everyone off.

99% of the time I would agree with Pavel, but the high compression makes this situation different than most.

By your logic you would lose MPG. So even that guys "unscientific" test points to that not being the case.

So everyone knows.

The higher the octane the slower the burn. You want the lowest octane that the car can function well at. Most of the time using higher than needed octane cost performance. With higher compression there is an increased chance of engine knock. Not even the audible type, just the type that the knock sensor picks up. When that happens the ECU pulls timing and in some cases dumps fuel. Both are bad for all aspects of performance.

The only real way to test would be to log sensor outputs and timing advance with both fuels.

[Adriaan]

personally i like the premium gas, i've has lots of problems with the regular gas here in ontario. The gas here is mixed with ethanol some times up to 15% except shell premium and i believe pioneer. i was having problems with the gas sensor. Took it to the dealer to find out that the since i was mixing fuel with and without ethanol the fuel turned a white color and had damaged the sensor. i work between montreal and toronto. In Montreal there is no ethanol in the fuel as of yet. Since i had it changed i stop buying regular here in ontario and haven't had the problem since. Also I work for esso and i found out that when you mix ethanol fuel like sunoco with regular fuel with out ethanol turns a white color, and as of yet there no technology to separate the two. But this is my experience and what i found out. Not sure if it is true with what i found, or my car was and isolated incident. Also i did a test with sunoco ultra 94 and shell premium on my last trip to montreal. Between my monteal house and toronto house is 686km with ultra 94 i got 536km and with shell i got 636km same driving style going and return about 120km to 140 km on the 401.