Quote:
Originally Posted by danvillekidd
Why is everyone bashing the op on the cost of premium vs 87 when he never mentioned cost? If he was not told that it was recommended and it's not posted on the car anywhere (gas cap only says to "tighten until one click or the service engine light may come on") why would you know to put premium in? The only reason I knew was I researched the car before I bought it. Using a higher octane than needed fuel is a waste of money and since the car was running without knocking or pinging he wanted to know why premium was recommended, nothing about cost or not wanting to use premium. To answer the ops question: Chevy put 2 tables in the ECM, one the requires the use of premium to get the advertised HP/performance from the car and the 2nd to allow the car to run on 87 without damage, but with loss of HP/performance. So you can safely run 87 in it, but to get the most Permagrin from it you will need to run premium! Also it has been found that the ECM won't switch to the premium table on its own so you will need to do a "fuse pull" (5 & 20) to reset it back to that table.
|
Ok, I stand corrected, I thought it did but maybe I'm just used to the fuel cap saying that.
To those asking how long to wait for the fuse pull, do it after a couple of tanks. Someone said do it first then fill with premium, I guess this would work if you drained your tank and fuel lines first. For most of us in the real world even when you fill up there will be 3-4 gallons in the tank from the older gas. It's a 19 gallon tank, how many of you have put in close to 19 gallons?