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Old 05-16-2007, 05:58 PM   #1
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Default CAI and Exhaust? Could this be the cause of oil consumption?

I thought I had read an artice somewhere that stated that if you put an aftermarket high flow exhaust and a cold air intake you might see some oil loss due to there not being as much backpressure in the motor. From what I think the oil gets deverted into the intake plenum area.

Anyone else hear about this?

I thought I read it in Nissan Sport Magazine regarding a different motor.
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Old 05-16-2007, 07:17 PM   #2
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I have had a catback and Popcharger in my car for about 35k miles. Ive never had oil consumption problems in my 05.
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Old 05-16-2007, 07:20 PM   #3
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I have a CAI, Header, and Catback on my Z since I bought it (put on at 1,500 miles). Never have lost any and gives great mileage, i.e. 27.5 -28.0 mgp on hwy and 19 in town.
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Old 05-16-2007, 07:36 PM   #4
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Quote:
Originally Posted by Netko350Z
I thought I had read an artice somewhere that stated that if you put an aftermarket high flow exhaust and a cold air intake you might see some oil loss due to there not being as much backpressure in the motor. From what I think the oil gets deverted into the intake plenum area.

Anyone else hear about this?

I thought I read it in Nissan Sport Magazine regarding a different motor.
Nothing you read makes any sense whatsoever. Disregard all that crap about back pressure within the motor, the magazine doesnt know what they're talking about. If you're really concerned, I'd suggest buying some form of engine management and having your motor tuned. good luck
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Old 05-16-2007, 07:39 PM   #5
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When I had my consumption testing going on, I removed the PC'er and put the stock intake back on for the testing.

It still drank oil at an average of 1 quart every 1,000 miles.

I did however always have the Nismo catback on.

I heard somewhere that test pipes cause or can cause oil consumtion. Don't know if there is any truth to that or not.
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Old 05-16-2007, 07:41 PM   #6
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Quote:
Originally Posted by Netko350Z
I thought I had read an artice somewhere that stated that if you put an aftermarket high flow exhaust and a cold air intake you might see some oil loss due to there not being as much backpressure in the motor.
Reference please. Thanks.
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Old 05-16-2007, 07:49 PM   #7
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Backpressure is bad end of story end of thread.

High exhaust velocity is good however.
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Old 05-16-2007, 07:49 PM
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370z, air, back, cai, cold, consumption, intake, intakeoil, oil, pressure



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