Infiniti G35 TwinTurbo M1 10w30 (+1qt of M115w50 make-up)

[GurgenPB]

Hey Guys

Last time I got some very useful advice on the oil i should use with this car. well, I have had the TTs in for about 5000miles now.

I would greatly appreciate any input that you guys may have on this.

Mainly... do I keep going with 10w30 or 10w40 or do I need to switch? Will switching help prevent the excessive lead breakdown. Most importantly, does the increased viscosity provide for better protection against wear or is it just to protect against thermal breakdown.

Gurgen

 

[Palut]

Probably a good idea to edit out your personal info...

 

[GurgenPB]

oops.... thanks for the heads up

 

[Al]

I have never seen Mobil 1 do this (thicken to this extent) I really don't understand it. You might be a candidate for RedLine oil.

I would seriously suggest paying Terry Dyson$20 to interpret this report for you. I can guarantee you will feel it is money well spent.

Something is not right here.

 

[Last_Z]

With only 2680 miles on the oil, this report does not look good at all......at least to me.
First, you need to tell us if you used leaded gas at any time, fuel additives, type of driving (drag racing, x-cross), etc.
I know the TT set-up will put much more load on the crank bearings than an N/A engine, so that could be part of the problem with the lead.
Also Iron, Aluminum, and Tin seem elevated to me. Silicone seems high also, so that can be contributing to higher wear levels.
I really wouldn't know if you'd need a thicker oil to absorb the shock of the TT set-up or thinner to allow more flow at high RPMs.
As recommended above, pay Terry his fee and get a much better opinion.

 

[Steve S]

With out knowing exactly boost and engine mods if any,there is more stress on the engine . It would seem prudent to try 15W/50 M1 if it is not too cold for that viscosity of oil. Make sure the feul system and the programming is up to par for the turbos ,and also is you foot on the gas pedal all of the time? mine would be!!! You will get more wear .

 

[GurgenPB]

Hey Guys

Thanks a lot for the ideas. I did add 1 qt of thick 15w50 make up oil shortly (500 miles) before the oil sample was taken. Do you think the oil thickened beyond limits even with this addition in mind?

As far as tracking, I did go to at least 3 drag strip events with thi car, on the same oil.

However, all this is not as relevant anymore, as I blew the engine YESTERDAY on Skyline Dr in S.F. The particulars (with PICS) can be found on the g35driver:web page

It was at a pretty low boost setting... So, 'll be building the motor back really soon.

[ September 19, 2004, 09:27 PM: Message edited by: GurgenPB ]

 

[buster]

This is not typical of M1. M1 rarely thickens. How many miles on the car and how many miles since you put the TT on? You might need a 5w-40 for this car, if nothing else is going on. Or a thicker 30wt oil.

 

[dropitby]

I guess M1 10/30 couldn't take the pounding.

Perhaps if he used Redline or Synergyn it might of lasted another week.

 

[Geoff]

Curious - did you use lower compression pistons as part of the turbo installation?

 

[GurgenPB]

No...they were high comp stock pistons... going with an all-out design soon

 

[Idrinkmotoroil]

FI engines almost always blow due to poor tuning and improper control of air-fuel. It was likely that your engine was detonating for a while which exerts excessive pressure on the rods and bearings = higher lead wear. I don't think the oil thickening issue had any relevance other than the fresh quart of 15w-50 added to it late in the interval. They don't mention anything about engine coolant in the oil so I'd have to assume all was fine. There wasn't any oil in the world that could have saved this engine. It was wearing quickly due to the high stress put on it. That has to be expected however when you take a naturally aspirated designed engine and force feed it. Bet it was fun to drive while it lasted though.

Sorry for your loss. Good luck on the rebuild.

 

[supraturbo]

Man that sux. I've been hearing the VQ35 doesn't live long when heavily modded. Never understood Nissan's obsession with the V6 in the american market when they had the RB26dett L6 oversea's that will handle pretty much everything you throw at it. Hope everything works out for you at least now you can build a reliable monster. Also doubt different oil would have made a difference.

 

[GurgenPB]

Gus...

This topic was discussed on the G35 and Z boards ad nauseum. The tuning of the car was perfect. I know that I am a newbie here guys, so you don't know me. The tuning on the car was a work perfect. I have a full-time wideband A/F meter in the car, so that is always getting monitored. The a/f was at 11.0-11.3:1 (a little on the safe side). I also have a J&S safeguard... that was taking out 5 degrees of timing and also knock-dependednt retard. If there was even inaudible knock, the tiing is begin get's retarded - and it wasn't... No audible pingin was present. So, the engine did NOT go due to poor tuning... There are severa possibilities... including a recalled crank angle sensor... that can really upset things as you know... Also, the rods on the VQ's are the weak link... Either way...the oil wa not to blame, and would not help here... but neither is the tuning.

G

 

[GSV]

My BOSCH MECHANIC says M1 blows engines....
Oh wait, that is somebody else.

Nice car, good luck getting it back together.

 

[ekpolk]

quote:

---

Originally posted by GurgenPB:
Gus...

This topic was discussed on the G35 and Z boards ad nauseum. The tuning of the car was perfect. I know that I am a newbie here guys, so you don't know me. The tuning on the car was a work perfect. I have a full-time wideband A/F meter in the car, so that is always getting monitored. The a/f was at 11.0-11.3:1 (a little on the safe side). I also have a J&S safeguard... that was taking out 5 degrees of timing and also knock-dependednt retard. If there was even inaudible knock, the tiing is begin get's retarded - and it wasn't... No audible pingin was present. So, the engine did NOT go due to poor tuning... There are severa possibilities... including a recalled crank angle sensor... that can really upset things as you know... Also, the rods on the VQ's are the weak link... Either way...the oil wa not to blame, and would not help here... but neither is the tuning.

G

---

I'm sorry if I sound like a smart a$$, but if it's not the oil, and it's not the tuning, then just what else would make your engine with its add-on turbos blow up??? I've got a G35 Sedan, which as you know, has a VQ35 with slightly milder stock tuning, and of course, no turbos added on. After the hurricane, all I could get for fuel was 87 octane, which I added to a half tank of 89 octane (bought a day or so before the storm, but after the premium pumps ran dry). I could barely get my VQ to ping on this swill. These are extraordinarily hearty engines. They don't just blow up -- without some provocation. Sure, you could be the coincidental victim of a rare bad engine, to which you happened to add turbos, but I think this is unlikely. No, something about your setup did this. The question, of course, is specifically what.

 

[crossbow]

elk,

Not to add to the flames any...but after seeing this thread, I ran through a bunch of 350z and G35 forums. (My friend was looking into boosting his). Seems there are alot of engine issues, especially with the 5th and 6th rods under turbocharged applications. The engine just can't take the boost. Ironically, it seems the supercharger kits (stillen in particular) don't seem to be having any issue at all...its just the turbo kits.

 

[mikeinaustin]

unfortunatly superchargers are also blowing this engine, here is a thread excerpt:

Well, I finally got my Infiniti dealer to tear down my engine, which was modified with a Procharger and had compression problems. They waited for an Infiniti factory guru to take a look. The diagnosis: There were tell-tale signs of detonation.

The coloration of the pistons indicated detonation, and at least one piston had a cracked ring. The reasons for this, as mentioned by the techs:

1. Timing was not adjusted. They said adjusting the ECU is MANDATORY with this type of modification.
2. The rev limiter was not modified. The engine revved up so **** fast that the factory limiter would routinely cut off the fuel supply, creating unsafe hot conditions as the blower was pumping air with no corresponding fuel.
3. This was a lesser issue, but they said the Procharger did not adequately filter the air being pumped into the engine.
4. My automatic transmission couldn't adjust to the proper shift points with all the extra power.

So I'm wiser and poorer now, after springing for a new engine. At least Infiniti agreed to honor the remaining 7/70 warranty with this new engine.

I hope that anyone else out there considering the Procharger can learn from my mistakes. Most notably, that you need to do a LOT of other modifications with the Procharger for it to run semi-safely, things that ATI doesn't suggest or recommend. If I had to do it over again, I would not get the ATI, but would get a stage 2 Stillen supercharger with the engine warranty, and put up with the uglier hood and slightly less power. As it is, I'll probably stay stock (except for keeping my Borla cat-back) and enjoy a fun, reliable ride.

 

[crossbow]

Well there ya go. Thanks mike for pointing that out.

 

[Eiron]

GurgenPB,

Sorry to hear about your grenade event. Your car looks really nice (except for that whole oil-puke-&-flatbed thing...). What's the oil capacity on this engine? Is 10W-30 the preferred spec? How often do you plan on changing the oil in the new engine?