Some Blue Smoke on Start Up

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
myother45isalesbaer
Posts: 955
Joined: Sun Nov 18, 2007 7:31 am
Car: 2004 M45 Q70 awd,4.5

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Wondering and Question to All M45 Owners. My 2004 M45 with less than 20,000 miles sometimes blows some blue (meaning oil burning) smoke on start up. I am running 5/30W regular oil. It does not eat any oil between 3K oil changes.

Here is my wonder. Back in the olden days when I was less than 55 years old my favorite oil was 10/40Castrol. Or any 10/40 name brand oil I could get. My Harley is running "fake" oil and doing just fine.

What is wrong with running the old style oil at say 10/40 and getting rid of the 5/30 or fake oil? I am seriously thinking we are all getting taken by the marketing guys who want to sell us 0/20 or 0/30 fake oil.

I might be too old to understand all their technical stuff, but I never saw a farm tractor blow up on 10/40 as I have seen cars cook themselves on 5/30 fake oil. I am switching the Harley to 20/50 real oil at the next change. No more fake oil for me.


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szh
Posts: 15932
Joined: Tue Jul 23, 2002 12:54 pm
Car: 2018 Tesla Model 3.

Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO!
Location: San Jose, CA

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I am going to move this to the M forum ... kinda not gonna be answered in the Computers forum.

Z

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szh
Posts: 15932
Joined: Tue Jul 23, 2002 12:54 pm
Car: 2018 Tesla Model 3.

Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO!
Location: San Jose, CA

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myother45isalesbaer wrote:Wondering and Question to All M45 Owners. My 2004 M45 with less than 20,000 miles sometimes blows some blue (meaning oil burning) smoke on start up. I am running 5/30W regular oil. It does not eat any oil between 3K oil changes.

Here is my wonder. Back in the olden days when I was less than 55 years old my favorite oil was 10/40Castrol. Or any 10/40 name brand oil I could get. My Harley is running "fake" oil and doing just fine.

What is wrong with running the old style oil at say 10/40 and getting rid of the 5/30 or fake oil? I am seriously thinking we are all getting taken by the marketing guys who want to sell us 0/20 or 0/30 fake oil.

I might be too old to understand all their technical stuff, but I never saw a farm tractor blow up on 10/40 as I have seen cars cook themselves on 5/30 fake oil. I am switching the Harley to 20/50 real oil at the next change. No more fake oil for me.
Okay, I'll bite ... what is "fake" oil? Did you mean synthetic?

In any case, if anybody is in relatively warm parts of the country, then 10/40 year round should be just fine too - regardless of whether it is dino or synthetic oil.

Also, you could run 10/40 in summer and 5/30 (or 5/40) in winter - depending on whether you get really cold weather in CT or not ...

Z

peter_rabbit
Posts: 169
Joined: Thu Aug 30, 2007 9:44 am
Car: 2003 m45 white pearl, '99 mustang gt vert

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I'm having the same problem with the blue smoke on start up also burning very little if no oil during oil changes. The dealer stated that to mainting the cars horsepower longer(in milage) the pistons had chrome rings. On some cars the oil will seep past the rings sometimes. I added a slightly thicker oil since then and i haven't seen the smoke on start up.


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