6.0 what grade fuel

[chevync]

Local I average 14.7 mpg since I added the airaid Jr and AEM dry filter. I was getting 13 mpg local and 16.7 highway. I still haven't been on any trips since the install of the airaid. Next month im planning on my 100k tune up, plugs and wires.

 

[95escahoe]

Local I average 14.7 mpg since I added the airaid Jr and AEM dry filter. I was getting 13 mpg local and 16.7 highway. I still haven't been on any trips since the install of the airaid. Next month im planning on my 100k tune up, plugs and wires.

Pretty decent numbers


Sent from my iPhone using Tapatalk

 

[#1taho]

I have been running 87 in my LQ9 6.0L and haven't had any issues. I had it tunned and they asked what grade fuel I used. They were suprised I had no detonation or knocking. I had zero issues. Drove to Pennsylvania last Sunday doing 80 mph getting 16.5 mpg and I wants being nice to the Taho either lol. And I am rolling on 22".

 

[chevync]

I have been running 87 in my LQ9 6.0L and haven't had any issues. I had it tunned and they asked what grade fuel I used. They were suprised I had no detonation or knocking. I had zero issues. Drove to Pennsylvania last Sunday doing 80 mph getting 16.5 mpg and I wants being nice to the Taho either lol. And I am rolling on 22".

No knocking or detonation with mine, im also on 22s. Once I install headers and exhaust ill be getting a tune so ill stay with 87 until then.

 

[#1taho]

No knocking or detonation with mine, im also on 22s. Once I install headers and exhaust ill be getting a tune so ill stay with 87 until then.

I think you will be fine with 87 with your tune.

 

[Rocket Man]

I just finished experimenting a bit since I have a BB Autocal so I can change my tunes from the 87-89 octane tune to the 91+ tune. I was running the 87-89 tune for awhile, then decided to try the 91+ tune and run a couple tanks of Premium. I honestly could not tell the difference in power or mileage (I get around 12-13 combined mileage , mainly city and I drive it hard) so I just reinstalled the 87-89 octane tune and filled with regular last week. I don't see any reason to pay 30 cents more per gallon. I'm running 26's.

 

[01ssreda4]

Most mass production engines will run normally on cheap crap gas. GMs which I deal with a ton will give a low and high octane table in the pcm. It decides a hybrid of where to run the ignition timing based on combustion. Even if you take the low table away, by copying the high table on top of it, timing is still very conservative from the factory. There is power to be had with a better timing curve and better fuel. You will feel the difference. Stock, running good fuel gets you a few more degrees of timing as it shifts between tables. That equates into power and throttle response but nothing crazy.

 

[Rocket Man]

Most mass production engines will run normally on cheap crap gas. GMs which I deal with a ton will give a low and high octane table in the pcm. It decides a hybrid of where to run the ignition timing based on combustion. Even if you take the low table away, by copying the high table on top of it, timing is still very conservative from the factory. There is power to be had with a better timing curve and better fuel. You will feel the difference. Stock, running good fuel gets you a few more degrees of timing as it shifts between tables. That equates into power and throttle response but nothing crazy.

That may be true with a stock tune, which I also have access to , but I believe BlackBear Performance must optimize their tunes for the different octane levels. That's probably why I couldn't tell the difference, at least I assume. I did ask Justin at BB if I ran the 91+ tune with regular gas, would it cause problems. He said it would probably just suffer performance-wise. Are you saying the factory runs a dual tune or some kind of variable tune in the PCM? I don't see how that could be possible, but maybe a tune more likely based on the lowest octane.

 

[Chip18]

`````````````Near as I can tell "American V8's" do seem to have a low octane and a high octane tuning map built in??

I had a friend with a built 5.0 Mustang and Nitrous ... 500 hp and he ran it on 87 octane??? Most 4 cylinder imports .. you tune for either 87 0ctane ... no one does that or 91 (93 seems to be an East Coast thing??) But they don't do either or?? You run a high output 4, on 87 and your gonna be picking up parts off the street!

Back in the day ... I had a Merkur 2.3 liter Turbo and it would run on 87 or 91 ... Ca car. It was a lot slower on 87 but it would run fine on it ... just not as fast.

 

[1992rs]

Thanks picked up an owners manual off EBay and that's what it says, been running 93 going to get a BB tune down the road, does anywhere in the USA sell 91? Only 87, 89 and 93 here


Sent from my iPhone using Tapatalk

Oregon does. Most generic brand gas stations use 91 as premium and the top tiers use 92.