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Thanks. That was my first choice. I cnx all orders. I think I will go back to my gut and listen to you. I have an electric fuel pump so it won't be too bad.
Personally, I wouldn't loose any sleep over it. Just drive easily and and put some 93 octane in it when your down about half a tank, and then do that again. Or go down to 1/4 tank before you refill with 93. That will get you to ~91 octane which is acceptable for normal use.
Of course, if engine lights come on or you hear pinging then you need to stop; but I really doubt that anything like that will happen.
I drove apx 15 miles home before I realized my mistake and I didn't see any warnings or hear any noises. Considering that I was only at 60-65 often on 4 cylinders, it was just in easy mode. I'll siphon out as much as possible and then I'll fill it back with 93. Are there any ridiculous turns in the filler tube to be careful of?
I drove apx 15 miles home before I realized my mistake and I didn't see any warnings or hear any noises. Considering that I was only at 60-65 often on 4 cylinders, it was just in easy mode. I'll siphon out as much as possible and then I'll fill it back with 93. Are there any ridiculous turns in the filler tube to be careful of?
Your C8 is NA. I wouldn't be too concerned. Like someone said, just drive like a grandma until you get that 87 as low as possible, then refill with 93. If you have 8 gallons of 87, just dedicate 1 weekend to get rid of it. Do 60 miles on sat, 60 on sunday. Most should be gone.
You can be NA and FI. NA means no Super or turbo charger. What are you trying to tell me?
FI meaning boost (forced induction). Not "fuel injected" lol.
Your car is NA. You should be fine with the 87 as long as you're not romping on the throttle. Just drive easy, get rid of that 8 gallons, or you don't even have to get rid of every drop. Run it down to 1/8 of a tank, then refill with 93.
"could be damaged" an asteroid could hit Earth and we all could die.....I'm pretty certain that driving on 87 octane for half a tank isn't going to destroy the engine. I've put 87 in my C7 before and no problems whatsoever.
Sigh. Is the C8 the same as a C7? Is an LT2 the same as an LT1? Does the C7 owner's manual have the same warning as the C8? NO, to all the above. Here's what he C7 OM says:
If equipped with the LT1 engine, use premium unleaded gasoline meeting ASTM specification D4814 with a posted octane rating of 91 or higher. Regular unleaded gasoline rated at 87 octane or higher can be used, but acceleration and fuel economy will be reduced, and an audible knocking noise may be heard. If this occurs, use a gasoline rated at 91 octane or higher as soon as possible.
The LT2 is more highly tuned to produce more power than the LT1. GM recommends 93 with a minimum of 91 for the C8, rather than 91 with a minimum of 87 for the LT1.
People, read the owner's manual. GM gave it to you for a reason.
Last edited by Red Mist Rulz; Nov 4, 2020 at 09:31 PM.
I unfortunately live in California, will 91 octane damage the vehicle in anyway besides reduced power?
I Live in Nevada with the same problem of only 91 octane. Still looking 4 solutions, maybe do full fill ups and add the same amount Some brands are not cheap!
Need to get the laws changed! 95 FOR EVERYBODY!
Any idea how long a hose I need to reach down into the tank - enough?
You can't just put a hose down the fill tube and syphon it, the rollover ball valve system makes it very difficult to do that (that's why you have no gas cap).
I think you're over thinking it too. Add some octane boost or blend in some higher octane gas and take it easy for a drive cycle. The ecu has a high octane and low octane timing table so if the knock sensors keep pinging while you drive without the preferred octane, the computer will compensate for it by going to the lower timing tables. Once premium fuel has been used for a bit and it no longer sees knock under spirited driving it will refer back to the higher table. Just take it easy for a bit.
The supply hose to my pump is small - fish tank size. Will it get past any obstruction? I'm using the supplied funnel to open the second closing flap. Now I know what it is for. I'll report back when finished.
The supply hose to my pump is small - fish tank size. Will it get past any obstruction? I'm using the supplied funnel to open the second closing flap. Now I know what it is for. I'll report back when finished.
I agree with Snowblind2.0, I would not shove a hose to syphon out gas. Either add Boostane Premium ( which is catalytic and 02 sensor safe) or 93 Octane at or around half a gas tank. If the ECM predicts or sees knock it will lower the timing. If the ECM continues to predict or see knock it will gradually go into the lower timing table. Once octane is restored, it will gradually go back up to the high octane table. The ECM timing tables do not work like a switch, but a more gradual movement. Stay out of WOT and you will be fine until you get 93 Octane.
BTW: I use Boostane Premium for my F.I. LS3 regularly to increase our crappy CA 91 octane to 94 octane. It works great and I have the data logs to prove it!
Last edited by Mike's LS3; Nov 5, 2020 at 10:24 AM.
I disagree with all that suggest to use the additive!!!!
At my age, My gut is usually correct and btw, Z is usually too!
It took all of 10 minutes to remove the fuel (apx 13 gallons) into 3 - 5 gallon gas containers that I'll use to fill my other vehicles as needed. A quick trip to Mobil or Exxon for 93 and I'm done.
As a Naval Aviator, there are no points for second place!
Mission completed- no fouls or missed points. It doesn't getuch easier or simpler.
Unfortunately, this wonderful device is no longer manufactured. One of the top 100 items I have ever purchased. I needed it to transfer fuel from containers to my sailboas's fuel tank. Yes I have 2 - 1 gas, 1 diesel.
May I suggest to other members, do it right the first time. There is never enough time to do it right the first time, but always enough time to do it right the second time.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
Funny, and I receive grief for acronyms. At least now it makes sense what you were saying. I felt like the scarecrow in the WoOz.
