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premium gas?

doverman

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arz71 Enthusiast

arz71

Posted
Posted

I would stay away from Ethanol!

 

The person who came up with using corn in fuel driving up food cost is a genius.

 

Thankfully where I live the stations do NOT have ethanol a proven engine destroyer.

 

What is the logic behind burning more fuel at a lower price and destroying engines with moisture, ect... ect...

 

I agree I do NOT nor will I shop at any Wall-China-Mart outfits, I have some dignity left in me to stop the hemorrhaging of jobs from going to CHINA.

 

Fuel like oil is not all the same!

wtbrowne Enthusiast

wtbrowne

Posted
Posted

Octane rating isn't an indicator of fuel quality. High octane gasoline resist detonation and is formulated for engines that run higher than normal compression and/or run with advanced timing. You will see no improvement in fuel mileage or performance if your engine is designed to run on regular gas. Motor fuels are refined at just a few refineries in the US and sent to various part of the country via pipelines. All brands generally come out of the same pipeline in your area. Distributors take this common fuel and blend in their specific additives near where the fuel is sold. Nearly everything you see and hear about one brand being superior to another is pure hype designed to influence motorist buying decisions.

Austin83 Enthusiast

Austin83

Posted
Posted

Nearly everything you see and hear about one brand being superior to another is pure hype designed to influence motorist buying decisions.

 

 

All fuels must meet a government standard prior to being sold. Top Tier fuels generally have additives to prevent deposits from collecting in your engine. Many of these additives are proven to keep your engine clean and running well. Many people choose to get the cheapest fuel they can get, and add Techron every few thousand miles. I choose to do what GM says is best for my vehicle because I paid a lot of money for my truck, and I intend on keeping it for a long time. I can get Top Tier fuel with Techron for the same price as Wal-Mart so it is a no brainer.

uh6tdrvr Enthusiast

uh6tdrvr

Posted
Posted

I get my best mileage out of Mid (89) but it runs best on Premium.

For those that say it does nothing switch grades, what about when you use E85, how does it know the difference then or is there not any computer compensation for the change?

cracked_up Enthusiast

cracked_up

Posted
Posted

If you're getting married and have budget constraints then you should be running 87.

 

Can't make it any clearer then this....

 

I'm not on a tight budget and I run 89 in my 6.2, don't notice any difference with the 93. My trips are short and easy so I see no reason to run 93 reccomended or not......

holty Enthusiast

holty

Posted
Posted

Thanks for posting that link to the Top Tier fuel suppliers. I'm bummed that BP is not on the list. I usually always look for a BP thinking they were top tier. THe only other Top Tier supplier in my area is Exxon. Looks like they're getting my business from now on.

Doug_Scott Senior Enthusiast

Doug_Scott

Posted
Posted

I think gas companies should be forced to stop calling higher octane fuel "premium". That word makes you think it is better. It is not better, it is just different. Same for "super".

AlaskanSilverado07 Enthusiast

AlaskanSilverado07

Posted
Posted

I work for an oil company.

 

PLEASE, PLEASE, PLEASE buy premium for your Chevy as it will mean I get a bigger bonus this year.

 

Which I'll tell you right now not a penny of it will go for premium fuel for my Avalanche.

 

All you're doing is putting money in MY pocket...unless you have a tune and have it tuned to the higher octane.

 

Or you're running a Volkwagen CC with 2.0 turbo in which case you have to run premium.

 

Otherwise, all you're doing is the old wealth redistribution the government does...from your pocket to mine.

 

;-)

Gurrzt Enthusiast

Gurrzt

Posted
Posted

As said above, find out what the compression ratio of your engine is, on my 6.2L and 5.7L engines it is 10.5:1 so I run "premiium fuel" (91 Octaine).

 

IMHO, if your compression ratio is < 9.5:1 I would use regular 87 Octaine fuel.

doverman Enthusiast

doverman

Posted
  • Author
Posted

I get my best mileage out of Mid (89) but it runs best on Premium.

For those that say it does nothing switch grades, what about when you use E85, how does it know the difference then or is there not any computer compensation for the change?

 

 

I was thinking the same thing. The computer must change the ingnition timing to compensate for the different ignition point on E85 so why wouldnt it compensate for running premium?

Gurrzt Enthusiast

Gurrzt

Posted
Posted
I get my best mileage out of Mid (89) but it runs best on Premium. For those that say it does nothing switch grades, what about when you use E85, how does it know the difference then or is there not any computer compensation for the change?
I was thinking the same thing. The computer must change the ingnition timing to compensate for the different ignition point on E85 so why wouldnt it compensate for running premium?

 

It does!!!, the lower the octane of the gasoline, the more the timing is retarded. The higher the octane the timing is advanced.

waumo1 Enthusiast

waumo1

Posted
Posted
I get my best mileage out of Mid (89) but it runs best on Premium. For those that say it does nothing switch grades, what about when you use E85, how does it know the difference then or is there not any computer compensation for the change?
I was thinking the same thing. The computer must change the ingnition timing to compensate for the different ignition point on E85 so why wouldnt it compensate for running premium?

 

It does!!!, the lower the octane of the gasoline, the more the timing is retarded. The higher the octane the timing is advanced.

 

You can see how much the timing is retarded by datalogging. I connected up the Trinity I have for the Challenger and did some datalogging on the Sierra this winter. Knock Retard was much more with 87 octane. There is still some Knock Retard even with 93. It would be worse in summer with higher ambient temperature.

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