V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3.4L Fuel (octane) to Use?

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Old

Jan 5, 2015 | 11:48 AM

#1

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Joined: Nov 2005

Posts: 668

Likes: 24

Car: 92 RS

Engine: 3.1 V6

Transmission: T5

3.4L Fuel (octane) to Use?

What's the best fuel to use after the 3.4L swap?

Old

Jan 5, 2015 | 12:11 PM

#2

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Joined: Mar 2009

Posts: 2,036

Likes: 28

From: Florida

Car: 1989 Camaro RS

Engine: LH6

Transmission: T56

Axle/Gears: 3.42 Auburn Posi

Re: 3.4L Fuel (octane) to Use?

87. Your compression isn't high enough for anything else.

Old

Jan 5, 2015 | 07:40 PM

#3

Thread Starter

Senior Member

Joined: Nov 2005

Posts: 668

Likes: 24

Car: 92 RS

Engine: 3.1 V6

Transmission: T5

Re: 3.4L Fuel (octane) to Use?

Thanks, been running 85 in it.. Mileage is way down so put 91 in it tonight.. Still throws a code 44 for lean exhaust... Will try to find 87 on the next tank...

Old

Jan 6, 2015 | 05:41 AM

#4

Supreme Member

iTrader: (4)

Joined: Mar 2009

Posts: 2,036

Likes: 28

From: Florida

Car: 1989 Camaro RS

Engine: LH6

Transmission: T56

Axle/Gears: 3.42 Auburn Posi

Re: 3.4L Fuel (octane) to Use?

Quote:

Originally Posted by LarryD

Thanks, been running 85 in it.. Mileage is way down so put 91 in it tonight.. Still throws a code 44 for lean exhaust... Will try to find 87 on the next tank...

85, 87 whichever is your regular unleaded. I'd take a look at injectors if they are the originals.

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