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370Z Oil Burning

I have seen a lot of people on here posting grief about this issue. Are they the minority or the majority of owners? If the majorit: Here are a few

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Old 06-24-2010, 03:43 AM   #1 (permalink)
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Default 370Z Oil Burning

I have seen a lot of people on here posting grief about this issue. Are they the minority or the majority of owners?

If the majorit:

Here are a few thoughts from a former LS1 owner (for those of you who know about the Ls1 engine):

I tried 5-30 Mobil 1 15K mile formula. It burned 1qt in around 2K miles. (a mixture of group III and group IV oils, after the loss of a lawsuit to Castrol, Mobil one cheaped-out and no-longer used fully group IV).

I then tried Castrol 10-30 Syntec (A hydrocracked mixture of Group III and group IV oils). It burned about 1qt every 2500-3K or so.

I then tried Castrol 10-40. Lifter noise was more pronounced (loud in an LS1 to begin with). I changed the oil.

I then tried Castrol European Formula 0-30 (which is actually thicker than their 10-30, at operating temperature. "weights" don't mean a darn thing.). It burned 1qt every 4500 miles. GC is a fully group IV oil.

Basically, I tried a few oils and DOUBLED the mileage per quart of oil I burned, all by just changing oils.

Mobil one is a very thin oil, always coming in on the "bottom" end of thickness range for it's "weight" at operating temperature. It usually "shears" out of its rated weight by 2K miles if you get the vehicle up to temp. at all.

Penn. Platinum is a pretty good oil. It does not shear nearly as badly as M1 does.

Castrol 0-30 is on the heavier side for it's "weight", and also shears VERY little as it is a true group IV oil.

Just some food for thought for you guys, some engines are picky about what you put in them.

Anyway, back to this noob's question: Is oil consumption a common 370Z issue, or not really? I know on the 350's it was hell.
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Old 06-24-2010, 08:22 AM   #2 (permalink)
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Not really common the only time I burned oil was with factory fill oil. But with the car breaking in that was normal. Using redline oil or amsoil I have yet to burn any.
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Old 06-24-2010, 08:29 AM   #3 (permalink)
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I agree with what you have found about the synthetics, only I haven't tried Pennzoil Platinum yet and still waiting for some information to be returned. My favorite is the European Castrol formula 0w-30 but sourcing it can be a problem.

I've found that if your running harder than normal with high RPM and a hotter than normal oil temp, you will burn off some oil (at least in mine) My observations show that if the oil temp is 110C (230F) I will burn off some oil. I definitely need a oil cooler. I don't like oil temps that are over 100C (212F) and will be doing something about it soon.

For the record, my choice of oil is Castrol GTX 10W-30, just because I change my oil more frequently and can't justify the cost of a synthetic oil with the frequent oil changes.
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Old 06-24-2010, 08:47 AM   #4 (permalink)
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Originally Posted by Daishi View Post
Not really common
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Old 06-24-2010, 10:55 AM   #5 (permalink)
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It isn't common. I haven't seen a post about it in awhile and I haven't experienced it. I didn't even burn any during break in.
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Old 06-24-2010, 11:08 AM   #6 (permalink)
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I check mine at every fill up and have not noticed any loss.

I've got 3600 miles on mine.

I've been running Castrol edge since I did my oil cooler install at around 1600 miles.
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Old 06-24-2010, 12:08 PM   #7 (permalink)
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Originally Posted by Zat_Zuma View Post
I agree with what you have found about the synthetics, only I haven't tried Pennzoil Platinum yet and still waiting for some information to be returned. My favorite is the European Castrol formula 0w-30 but sourcing it can be a problem.

I've found that if your running harder than normal with high RPM and a hotter than normal oil temp, you will burn off some oil (at least in mine) My observations show that if the oil temp is 110C (230F) I will burn off some oil. I definitely need a oil cooler. I don't like oil temps that are over 100C (212F) and will be doing something about it soon.

For the record, my choice of oil is Castrol GTX 10W-30, just because I change my oil more frequently and can't justify the cost of a synthetic oil with the frequent oil changes.
Autozone is who carries it around here. Also, why change oil so frequently? With a true group 4 unless you are getting fuel dilution or running hot (which it seems you aren't), there is no need. I have even read that oil analysis with a GOOD oil that doesn't sheer shows less wear towards the end of the usage of the oil than the beginning. Again, this is READ, not personal knowledge.

Any oil temp under 280* should be fine from what I have read in the 'vette world. Is there a reason why this is too high in a 370Z?
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Old 06-24-2010, 01:27 PM   #8 (permalink)
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370z doesnt come with an oil cooler at all.

Synthetic is fine up to 300, conventional should never be above 260
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Old 06-24-2010, 01:50 PM   #9 (permalink)
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Any oil temp under 280* should be fine from what I have read in the 'vette world. Is there a reason why this is too high in a 370Z?
280 is the point the ECU puts the car into Limp mode to protect the VVEL system. The chances of that happening on the street are extraordinarily slim. Oil temps drop as these cars break in. 220-240 are normal street temps without a cooler. You will drop approximately 25 degrees with a correctly sized cooler installed. If Nissan had not installed an oil temp gauge, no one would be obsessing about this..
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Old 06-24-2010, 03:25 PM   #10 (permalink)
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Originally Posted by Modshack View Post
280 is the point the ECU puts the car into Limp mode to protect the VVEL system. The chances of that happening on the street are extraordinarily slim. Oil temps drop as these cars break in. 220-240 are normal street temps without a cooler. You will drop approximately 25 degrees with a correctly sized cooler installed. If Nissan had not installed an oil temp gauge, no one would be obsessing about this..
Or if Nissan put a 'normal' range on the gauge.
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Old 06-24-2010, 03:31 PM   #11 (permalink)
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I am simply saying that noone who road-races worries until they get deeeep into the 200's unless the 370 is somehow a different creature, I wouldn't worry, either.

Has anyone spun a main?
Has anyone had pre-mature wear that resulted in compression loss or blow-by?
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Old 06-24-2010, 03:58 PM   #12 (permalink)
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Lets not start with another Oil Thread.
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Old 06-24-2010, 04:02 PM   #13 (permalink)
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Got a little over 1200 miles on her and I burned nothing. Checked it almost everytime I put gas in her. Gonna give her a few more miles before I put the RedLine sitting in my garage in her.
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Old 06-24-2010, 04:28 PM   #14 (permalink)
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Lets not start with another Oil Thread.
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Old 06-24-2010, 05:25 PM   #15 (permalink)
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Sorry, I can see this is a sore thumb here and it brings out the OMGZ! MY OIL! mentality. My apologies. I was just offering some advice to those who have the issue and looking for a pulse on it.
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