regular or premium gas for v6 camaro?

[Leo72793]

Originally Posted by MagnumForceGB

I've tuned both Camaro V6 engines, the LLT and LFX. The LFX tune has 2 octane tables, high and low. When a fresh tune or ECU is reset (fuse pull) the Knock Learn Factor is at 0.00, meaning it uses 100% High Octane timing table. When knock is detected, the knock learn factor increases based on the amount of timing being retarded and starts to blend the 2 tables together. If the knock retard has to be constantly active, the knock learn factor will hit 1.00 and the low octane table will be used all the time. If the knock sensors are deactivated, the low octane table is used.

On the LLT, it is only tuned for 91 octane (99% can't understand the Bosch ECU) and uses the knock sensors to run on 87. It will remove timing till it doesn't see knock, but the problem is it has a huge recovery time. The max timing removed can be 12 degrees (below 6000 RPM, higher RPM's is 15 degrees) and can take over 2 minutes to remove that knock retard.

The LLT is 11.3:1 compression ratio, the LFX is 11.5:1, the only reason they can run 87 octane is direct injection and very sensitive knock sensors.

SO my 2010 LLt 3.6 is factory tuned for 91 octane? hmmm. guess why 87 gives me CRAP mileage

[Ccl412]

I've been running premium just out of habit. Got 2100 miles on her (2015 1LT)running great very noisy engine but runs great

[fhrex]

I've had mine for almost a year, running regular: no issues at all

[ghosted]

Originally Posted by dfyguyi

got mine a week ago and i need to put gas. what type of gas should i put it? regular or premium?

5 pages on the topic, and you choose to ask the same question that's been discussed for 5 pages instead of reading? Come on dude.

[MagnumForceGB]

Originally Posted by ghosted

5 pages on the topic, and you choose to ask the same question that's been discussed for 5 pages instead of reading? Come on dude.

It's a spam bot, has image links in the post.

[glider1]

It's the same as the very first post. Funny.

Sent from my DROID RAZR using Tapatalk

[AppleBomb]

As everyone is saying on here, octane ratings really dont affect performance in the sense of mpg. It CAN however sometimes feel smoother and cleaner, which brings me to my real point. Higher Octane rated fuel won't necessarily boost your car, CLEANER gas will. Not every station is the same, even if they have the same ratings. Gas stations that are attached to giant department stores are what i would avoid. Private gas and oil companies usually have cleaner and longer lasting fuels, and I would definitely drive the extra couple of miles to keep the gas tank happier. Down here I tend to stick to Shell and Valero down here, sometimes Chevron. When I'm feeling squirrely, I tend to pay a visit to our local VP station.

[IneedAZ]

Originally Posted by AppleBomb

Down here I tend to stick to Shell and Valero down here, sometimes Chevron.

Even Big name brands like Shell stations can have differences. I am tempted to call the number on the pump and have my local Shell investigated to see if the 93 tank actually has 93 in it. Several times after getting gas there my car has felt like it is using the low octane timing tables. Power was way down. When i use the Shell near my office 40 miles away i dont seem to have those issues.

[TooCool5]

Not this again, dusting off an old thread.......

[High Magnitude]

I use regular but someone said that it ran smoother with 93 which makes sense

[Mr. Stacy]

Originally Posted by AppleBomb

As everyone is saying on here, octane ratings really dont affect performance in the sense of mpg. It CAN however sometimes feel smoother and cleaner, which brings me to my real point. Higher Octane rated fuel won't necessarily boost your car, CLEANER gas will. Not every station is the same, even if they have the same ratings. Gas stations that are attached to giant department stores are what i would avoid. Private gas and oil companies usually have cleaner and longer lasting fuels, and I would definitely drive the extra couple of miles to keep the gas tank happier. Down here I tend to stick to Shell and Valero down here, sometimes Chevron. When I'm feeling squirrely, I tend to pay a visit to our local VP station.

The only real difference is the additive mix. Which the amount has actually gone down since the '95 mandate for minimum additives set by the EPA. The same tanker goes from one station to the next filling their tanks and adding the appropriate additive for that brand.

It is safest to always buy your fuel from a busy station. At a busy station there's less potential for water to condense from the air and settle into half-empty tanks.

''I can't say one brand is better than another,'' said Dr. Edward Murphy, a spokesman for the American Petroleum Institute, a trade group that represents oil companies in Washington. ''Base gas is a freely traded commodity that must meet certain government specifications. It flows through common pipelines into commingled storage tanks.'' What he could say, he added, is that ''the major brands spend R-and-D money on patented additives, which they add to the basic gas.''

[Dizzy82]

Prior to FI = 87. Now that I'm FI = minimum 91.

[ghosted]

Originally Posted by MagnumForceGB

It's a spam bot, has image links in the post.

Ah, couldn't see the links.

[lawman007]

I had the P0420 engine light come on. This was about a year, year and a half ago. Had to do with cats. I was living in Sac Town in CA at the time. Drove it to Charlotte NE in Jan2021. Light only came on twice. I was using Reg(87 Octane). Since I got here, light has come on several times. I decided to try the 93, full tank. The light has not come back yet, but now we have this shortage on. This was Exon gas. If anything, I would say the higher octane and additives are better for my V-6. At least it seems not to clog up the cats, and if they are, clears them out. Not sure what they use but they won't say.