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Matt
Matt, Engineer
Category: Infiniti
Satisfied Customers: 20593
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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My 06 m35 is losing oil(100% synthetic) no visible leaks or

Customer Question

my 06 m35 is losing oil(100% synthetic) no visible leaks or smoke. I was wondering if it has a clogged pcv like the old dinos.
JA: An oil leak can be frustrating and tough to diagnose. Fortunately, the mechanics we work with have tons of experience dealing with them. Tell me a bit more about what's going on so he can help you best.
Customer: oil levels drop nearly a quart between changes, no visible leaks and no smoke.
JA: Are you hoping to fix this yourself?
Customer: yes
JA: Great! What have you tried so far?
Customer: nothing.
JA: Is there anything else the Infiniti Mechanic should be aware of about your Infiniti?
Customer: 140k otherwise,
great operation
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Infiniti Mechanic about your situation and then connect you two.
Submitted: 6 months ago.
Category: Infiniti
Expert:  Matt replied 6 months ago.

Hello

I'd agree that the first thing to check is the crankcase pressure relief valve (PCV) these are sprung loaded and are only meant to 'burp' excess pressure every now and then. The exiting gas is piped back to the inlet, however should the valve stick open then the engine tends to suck the air out of the crankcase all the time and this carries oil over with it.

If you remove the air intake pipe and look inside where the crankcase breather is plumbed in you may find evidence of oil.

If you do find oil replace the valve.

also what oil are you using ? as if its on the 3.5ltr V6 then it should be using a 5W30 weight

Expert:  Matt replied 6 months ago.

Hi

do you still need help?

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