Resolved Oil Consumption Issue with 2007 G-35 Infinity Coupe 6MT RAS

[Jacko3]

I bought my 2007 G-35 Coupe 6 MT Rev up Engine, Rear Active Steer, GPS (navigation), in March of 2007. It also came with a limited slip differential (LSD). Within a few months, I noticed the engine was consuming about 1 quart of oil at almost 900 miles. I was literally using 2.5 to 3 quarts every 3,000 miles. Of course, i used Mobil 1 Synthetic for a while. Though synthetic oil helped to improve MPG a great deal. Synthetic blend is not as good with MPG. Car is always thirsty for fuel with synthetic blend. Still, I won’t use synthetic oil anymore in this car. Dyno and Blend is just about right.

I complained about the engine problem for a few months, and eventually I was put on an oil consumption test. During the consumption test, the technician and I would smell oil coming from the hood. Regardless of this problem, I was still very happy with the car.

When i finally dropped my car off, it appeared Infiniti had already come up with a fix for this problem. Of course I found out about this problem and the revised VQ engine on a G-35 forum. Within a week the revised engine was shipped to the dealership and within 4 days the engine was installed. That new engine number is 10102-AC7M9.

Old Engine: Old engine was fun but now I realized it was really weak and had less compression. In fact, I now believe that the old engine would have hurt my transmission and clutch system in the long run because it made the systems work harder than they should. This engine ran a lot more hotter after any trip than the new revised one. On many occasion, i was able to floor the pedal to the floor, without any additional power. That was how bad it was. I thought that was strange since a new car should not allow me to do this. Well, that flooring of the pedal suggested that the engine did not have enough compression and power. And I also found myself routinely having to revv up to 6,000 to 7,000 RPM to get the most power from the car. It burnt a lot of oil.

New Revised Engine: It has a lot more torque at low RPMS and up to 5000 RPM--very surprising—I don’t know what to do with that much torque. The torque pins me to my seat. It really feels like it is gliding when the torque comes on. Sometimes I put one arm outside my window as if I was in a rodeo, when I press the gas pedal, and when the torque comes on. I Have 300miles on it so far, and oil level is at the full mark, after slightly less than half a quart of oil in the first 1,500 miles. Oil level has stayed the same from 1,500 miles to 3,200 miles Can't find reason to rev up the engine beyond 5,000 RPM--rarely do these days. Uses Pennzoil synthetic blend of 5W-30. Engine seems slightly more quite and gentle than previous engine. I doubt I will ever use synthetic oil again on this engine. Engine seems also to be more integrated with the transmission. I hear less rattle all around. The mechanic who replaced engine performed wonders on my car. Car drives better than when i bought it initially. Extra torque makes it hard to drive in the rain. Extra torque makes the limited slip light to come on most times in the rain as the wheels just spins. So, for this i rarely drive it now in the rain with the VDC ON. Limited slip came on only once with old engine but comes on most times with new engine because of the extra torque. New engine is more powerful than old engine. Maybe this is so because it is still new. So, I drive with some more caution with this new revised engine. I don't think i will be needing any modifications with this new engine, except for a Cold Air Intake (Injen) and a Cat-back exhaust (Stillen). I always smoke other cars from a dead stop with this new engine because of the torque it has. Take-off is great!

I am beginning to suspect that my engine is either a revised and improved version of the 2003 and 2004 G-35 model engine or a revv up VQ engine with borrowed technologies from the G-37 HR engine. The exhaust note it produces is still as sweet to the hearing. I saw my engine before it was installed. I t made my heart flutter.

However, to get this engine, be nice and friendly with the service manager and service consultants. Be patient but persistent with them. Don't be a pain in the behind or a jerk, except they are obviously trying to screw you around. I got this engine with no hassle or threats. In fact, during the oil test period, i received free cans of oil and a replacement of my PCV, for free, for the old engine. At 3,200 miles, the oil in the new revised engine looks so clean and great. The old engine’s oil became very black and scary at 2,000 miles. The service consultant, mechanic, and service manager, were fantastic. I wrote their management with rave reviews of the performance of their three staff.

I usually drive with my VDC OFF except in the rain or on really tight corners at high speeds--for safety. The rear active steer is a driving miracle. At higher speeds, the car gets tighter and tighter. I think the Rear active steer adds more balance and control to the car. In fact, at 80 MPH around a curve, I hit a bump, and the car shook but stayed firm. The car literally corrects itself at high speeds. I have lost my nerves a few times before the car did. So long as you manage your steering input very meticulously, the rear active steer and VDC will keep you out of trouble.

This is my experience so far. I shall wait to see how the oil issue pans out at 5,000 miles. This car is fun to drive. Can't go wrong with the G-35 Coupe regardless of the year and model. I am totally sold on Infinity—the best car company ever. So, I am an Infinity guy for life because they treated me very well.

N.B. I drove the G-37 and I was impressed with its instantaneous power delivery. The car is very refined inside. Its steering wheel is more responsive. I will say the steering is overly too responsive. The brakes are truly powerful and remarkable--a lot of peace of mind. However, it seems to have less torque than the revised VQ engine. The car is not as attractive as a G-35. I have waited for the looks to grow on me, but it hasn't happened yet. It seems the G-35 will go down as a classic while the G-37 wil go down as a collector's item. Except a dumbed down version of the Nissan GT-R is transplanted into a future G-35, i doubt the value of the G-35 will ever fall too far from profitability. Infinity needs to pay more attention to aesthetics. The G-35 did not have to grow on anyone. It was just a beautiful driver’s car from the very beginning. The G-35 feels more like a track car than the G-37. G-37 seems to behave like a powerful sedan, while the g-35 behaves more like a rough/unforgiving race track car--which is how I like it.

Just my 2 cents. What are your thoughts on this?

[joe603]

Welcome to NICO!

Holy wall of text! I'm with you on the G37...not as much torque as the G35, and the styling is unique. However, I really hated the steering feel...it's the same on the 07 sedan; just a numb feeling when cornering.

As far as your engine comments, I have nothing but good things to say about my RevUp (2005). It really woke up after the MREV2 and plenum mods. No oil consumption at all after 24k miles.

[Jacko3]

Joe603:

Thanks! Your ride looks really nice and sweet. Are those 19 inch wheel? My has 19 inch wheels and I was wondering if it would make sense and still look good lowering the car with Eibach coils on those 19 inch wheels?

[joe603]

The car would look great lowered! I'm happy with the OEM suspension though....I would love to have about 50 more HP though

FI is next on my mod list!!

[Jacko3]

I am going to have to wait for F1 until my warranty is over!! The G is a really sweet car to drive. Hard to pass by the car in the morning in the garage without appreciating its subtle and inexplicable beauty.

[G_whizz]

FI is next on my mod list!!

Does the wife know this??

[Kenrik]

Hey Jaco, we are in the same area (Fort Lauderdale) I hope your dealer is not Infiniti of Coconut Creek.Their service department has been terrible with me.

[joe603]

Does the wife know this??

YUP! Every time she asked me what I wanted for x-mass, I said a supercharger ....She's probably sick of hearing about it!!

[telcoman]

I bought my 2007 G-35 Coupe 6 MT Rev up Engine, Rear Active Steer, GPS (navigation), in March of 2007. It also came with a limited slip differential (LSD). Within a few months, I noticed the engine was consuming about 1 quart of oil at almost 900 miles. I was literally using 2.5 to 3 quarts every 3,000 miles. Of course, i used Mobil 1 Synthetic for a while. Though synthetic oil helped to improve MPG a great deal. Synthetic blend is not as good with MPG. Car is always thirsty for fuel with synthetic blend. Still, I won’t use synthetic oil anymore in this car. Dyno and Blend is just about right.

I complained about the engine problem for a few months, and eventually I was put on an oil consumption test. During the consumption test, the technician and I would smell oil coming from the hood. Regardless of this problem, I was still very happy with the car.

When i finally dropped my car off, it appeared Infiniti had already come up with a fix for this problem. Of course I found out about this problem and the revised VQ engine on a G-35 forum. Within a week the revised engine was shipped to the dealership and within 4 days the engine was installed. That new engine number is 10102-AC7M9.

Old Engine: Old engine was fun but now I realized it was really weak and had less compression. In fact, I now believe that the old engine would have hurt my transmission and clutch system in the long run because it made the systems work harder than they should. This engine ran a lot more hotter after any trip than the new revised one. On many occasion, i was able to floor the pedal to the floor, without any additional power. That was how bad it was. I thought that was strange since a new car should not allow me to do this. Well, that flooring of the pedal suggested that the engine did not have enough compression and power. And I also found myself routinely having to revv up to 6,000 to 7,000 RPM to get the most power from the car. It burnt a lot of oil.

New Revised Engine: It has a lot more torque at low RPMS and up to 5000 RPM--very surprising—I don’t know what to do with that much torque. The torque pins me to my seat. It really feels like it is gliding when the torque comes on. Sometimes I put one arm outside my window as if I was in a rodeo, when I press the gas pedal, and when the torque comes on. I Have 300miles on it so far, and oil level is at the full mark, after slightly less than half a quart of oil in the first 1,500 miles. Oil level has stayed the same from 1,500 miles to 3,200 miles Can't find reason to rev up the engine beyond 5,000 RPM--rarely do these days. Uses Pennzoil synthetic blend of 5W-30. Engine seems slightly more quite and gentle than previous engine. I doubt I will ever use synthetic oil again on this engine. Engine seems also to be more integrated with the transmission. I hear less rattle all around. The mechanic who replaced engine performed wonders on my car. Car drives better than when i bought it initially. Extra torque makes it hard to drive in the rain. Extra torque makes the limited slip light to come on most times in the rain as the wheels just spins. So, for this i rarely drive it now in the rain with the VDC ON. Limited slip came on only once with old engine but comes on most times with new engine because of the extra torque. New engine is more powerful than old engine. Maybe this is so because it is still new. So, I drive with some more caution with this new revised engine. I don't think i will be needing any modifications with this new engine, except for a Cold Air Intake (Injen) and a Cat-back exhaust (Stillen). I always smoke other cars from a dead stop with this new engine because of the torque it has. Take-off is great!

I am beginning to suspect that my engine is either a revised and improved version of the 2003 and 2004 G-35 model engine or a revv up VQ engine with borrowed technologies from the G-37 HR engine. The exhaust note it produces is still as sweet to the hearing. I saw my engine before it was installed. I t made my heart flutter.

However, to get this engine, be nice and friendly with the service manager and service consultants. Be patient but persistent with them. Don't be a pain in the behind or a jerk, except they are obviously trying to screw you around. I got this engine with no hassle or threats. In fact, during the oil test period, i received free cans of oil and a replacement of my PCV, for free, for the old engine. At 3,200 miles, the oil in the new revised engine looks so clean and great. The old engine’s oil became very black and scary at 2,000 miles. The service consultant, mechanic, and service manager, were fantastic. I wrote their management with rave reviews of the performance of their three staff.

I usually drive with my VDC OFF except in the rain or on really tight corners at high speeds--for safety. The rear active steer is a driving miracle. At higher speeds, the car gets tighter and tighter. I think the Rear active steer adds more balance and control to the car. In fact, at 80 MPH around a curve, I hit a bump, and the car shook but stayed firm. The car literally corrects itself at high speeds. I have lost my nerves a few times before the car did. So long as you manage your steering input very meticulously, the rear active steer and VDC will keep you out of trouble.

This is my experience so far. I shall wait to see how the oil issue pans out at 5,000 miles. This car is fun to drive. Can't go wrong with the G-35 Coupe regardless of the year and model. I am totally sold on Infinity—the best car company ever. So, I am an Infinity guy for life because they treated me very well.

N.B. I drove the G-37 and I was impressed with its instantaneous power delivery. The car is very refined inside. Its steering wheel is more responsive. I will say the steering is overly too responsive. The brakes are truly powerful and remarkable--a lot of peace of mind. However, it seems to have less torque than the revised VQ engine. The car is not as attractive as a G-35. I have waited for the looks to grow on me, but it hasn't happened yet. It seems the G-35 will go down as a classic while the G-37 wil go down as a collector's item. Except a dumbed down version of the Nissan GT-R is transplanted into a future G-35, i doubt the value of the G-35 will ever fall too far from profitability. Infinity needs to pay more attention to aesthetics. The G-35 did not have to grow on anyone. It was just a beautiful driver’s car from the very beginning. The G-35 feels more like a track car than the G-37. G-37 seems to behave like a powerful sedan, while the g-35 behaves more like a rough/unforgiving race track car--which is how I like it.

Just my 2 cents. What are your thoughts on this?

Great post Jack03

Welcome to NICO

Much has been written and posted on this topic.

zerothread?id=283967

Telcoman

[tollboothwilley]

Somebody was excited enough to get that all off their chest!!Wow, bet you got carpal tunnel now right??

Telc...way to make this thread even longer by quoting him

WELCOME TO NICO JACKO

[Jacko3]

tollboothwilley, Telcoman, and Kenrik:

Thanks! How are you guys doing today?

[millenium]

Hi Jacko3,
I read your post and the way you described your car's performance sounds exactly like mine, which is an 06. I have had the car since 10/06 and was built in 4/06. I believe
the cars built with the revup engine from 1/06 thru 5/06 ( ? ) with the vin # starting at a certain point, had cars that were problamatic. My engine feels tight and feels like
its straining to go up the rpm's. This has been like this since i got the car. I would get service cars to use that were 05-06 g35 sedans, and these engines just reved freely
with ease and no indication of any engine strain. I decided to check out some forums and found the oil consumption problem. I would always ask at the dealership if there
was anything i should know about the car to look out for and would always be told no. They only items i received was the headlights and seatbelts. The oil is the life of the
engine. I would think this would be something the owners should of been aware of to monitor. I only put 1000 miles on the car per year and it currently has 6100 + miles
We started the 0.C test on 04/12 with 5711 miles on the car.I brought it to the dealership with 428 miles on the car since the oil change and filter. They checked it and found it was down 20mm. This is far down the chart of No Good. If i was made aware of the oil consumption, i would of fallen in the range when the TSB was putting in
new engines. What you received sounds like what everyone should have. Your excitement about your car is how everyone should be talking about their cars.
What they offer now is not acceptable and will look for the dealer to help me convince Infiniti to get a new engine for me. I am the only car i was told that failed the O.C. test.I am hoping this may sway the Rep to authorize the new engine you mentioned in your post.
I was wondering now that your car's new engine has more miles on it, could you give some additional feedback how the car is performing since its now broken in as well
as any oil consumption issues ? Did you happen to switch to a different oil or are you still using Mobil 1 ?

Note * I did read a post that i cannot find yet, or what forum, where the person said he was also given a new engine. He mentioned the part number of the engine was the same as the engine that came in his car, but the new part number for the replacement engine ended with " A ". He insisted if you do get this engine to make sure there is the " A " at the end of the engine part #, or again, you are just getting the same engine that came in the car originally. Does anyone recall reading this post and if so,
could you post where ?

Thank you Jacko3 and everyone else on the other replacement engine.

millenium