Question About Premix And A/F Ratios

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Apr 27, 2008 | 09:51 PM

RX7 13B 4 UR AZZ

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Joined: Feb 2003

Posts: 1,591

From: Miami, Florida

Does running premix effect your a/f ratios? Does it effect your O2 sensor? Will a wideband O2 sensor freak out if you use premix?

Apr 27, 2008 | 11:15 PM

jwteknix

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Joined: Sep 2005

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From: Wayne NJ

it should be fine if you use tcw3

Apr 28, 2008 | 04:32 AM

RX7 13B 4 UR AZZ

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Senior Member

Joined: Feb 2003

Posts: 1,591

From: Miami, Florida

Ive known for a long time to use TCW3 In any premix situation but I heard somewhere any premix screws the O2 sensor.

Apr 28, 2008 | 08:10 PM

1988RedT2

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Joined: Apr 2002

Posts: 2,535

From: VA

Quote:

Originally Posted by RX7 13B 4 UR AZZ' post='899448' date='Apr 28 2008, 05:32 AM

Ive known for a long time to use TCW3 In any premix situation but I heard somewhere any premix screws the O2 sensor.

I'm sure if you use too much premix, yes you would hose the O2 sensor. I'm thinking the proper ratio would be okay. Can't say for sure though.

May 1, 2008 | 12:30 AM

1Revvin7

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Joined: Oct 2001

Posts: 10,906

From: Peoria, AZ

Yup premix, like any oil harms o2 sensors. It will shorten the life, by how much? Whos to say. When most sensors take a crap they will let you know however.

May 5, 2008 | 12:08 AM

KompressorLOgic

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Joined: Oct 2003

Posts: 714

From: WA, Renton

i have a wideband thats been in a car for about a yr now, and switched it over to top of down pipe on my other t2 which is premixed and its been working for over a month no problems.