I'm getting ready to buy a 08' G35x and was wondering how much oil everyone uses between changes on the VQ35HR? I am just curious if it's as bad as my VQ35DE cars.

 

Oil consumption is practically nonexistent on that motor. Unless something is wrong with it.

 

I have this engine and (knock on wood), this is the case for me in a little over 20k miles that I've owned it. A lot of misinformation out there (including here) with G35 engines where people paint broad strokes about oil consumption issues. When I got mine, I checked the oil level every 1-2 weeks in the morning after it sat in the garage overnight because of those stories. I eventually moved to checking ~3 weeks or so maybe.

 

Even if it doesn't use oil it's a good habit to keep up with. Good to hear they don't have the same issue. Hopefully I'll get the car this weekend and get to play!

 

The only engine that you can practically guarantee oil consumption on is the rev-up. The rest of the DE's were hit/miss and probably due to neglect or abuse if it drank more than 1qt per oil change interval. The HR/VHR have what would be considered NORMAL vehicle oil consumption which is about 1/4 qt per interval.

Unfortunately this is just one of the problems you will have on ANY engine that uses valve overlap in place of an EGR valve to meet emissions standards.

Personally I'm on the side of valve overlap, I would rather a little extra ring wear rather than a factory EGR valve for a fleet of vehicles that were under warranty. Yes if the vehicle had an EGR valve then aftermarket would have a blockoff plate available for it (bypassing emissions and thus not legal however) but I'm looking at this from Nissan's point of view. EGR has caused nothing but problems on EVERY vehicle it's installed on, by 100k miles the intake tract is completely covered in black crust and slime, at least with valve overlap you restrict the damage to ONLY inside the combustion chamber.

Obviously the best solution would be no EGR and no valve overlap but that just isn't possible from a manufacturing standpoint. The only reason diesel engines don't experience the same premature ring wear is those rings are lubricated from both sides which mitigates the damage substantially however it did cut overall life expectancy of diesel nearly in half compared to pre 2004ish when they were forced to use EGR as well. I don't think valve overlap on diesels are even used anymore because their emissions control requirements are EXTREMELY high now.

Cross your fingers that the EPA doesn't mandate stricter requirements for gasoline engines or engines might be factory burdened with EGR again.

The oil consumption is easily mitigated however, check your oil as frequently as needed, on my rev-up it was every 500 miles. Most newer engines you're good checking it every 1000 but the point is CHECK YOUR OIL lol.

 

Yeah, EGR sucks. My foxbody and the SR20's we work with had it and we deleted all of it and had to strip everything clean. I found the engines that consume a lot of oil that we have rebuilt (2AZFE the worst so far) are usually the oil control rings. They usually get spongy and caked with carbon and gunk and stop wiping the cylinder walls. On some models they use new style thin low friction rings that don't last very long compared to conventional rings. We did a 2AZFE bulletproof build and the engine originally ate more oil than it could hold within the 3k mile change. We have over 20k miles on that rebuild and it uses only a tad over 1/2 quart in 6k miles with synthetic. It will be interesting when we build the VQ35DE to see what shape the rings and cylinder walls are in. It's also good to know they fixed it in the HR/VHR series.

 

I've never had to add oil between changes.

 

I'm glad to hear nobody has had the issue even in high mileage cars. I just picked my 08' 125k mile G35x up Saturday so I get to start learning about the V36 platform now!

 

I picked up an '08 like yours with 136k last november. First thing I did was change all the fluids. Changed the oil again at 5k miles and didn't notice any decrease on the dipstick. At 152k now and I check every 2 weeks, still not seeing any decreases.

 

Nice! I'll probably change mine at 3k since I don't know what type of oil was used in it. Move to synthetic and go to 5-6k changes after that. It's weird how the HR sounds so different from my DE cars. I guess the long con rods and Y to dual exhaust makes that much difference.

 

zero oil consumption @ 89k miles

 

Mine uses 1/2 of quart between changes and I'm at 160k.

 

Yeah the HR sedan sounds a lot more like the DE coupe, one of the reasons the HR or coupe y-pipe is such a popular exhaust mod for the V35 sedans.

 

No noticeable oil consumption between changes and at the full mark on dipstick even at 6-7k miles. I�ve used the best version of Amsoil 5W-30 that they sell since I dropped the factory fill at 2k miles. I am at 102k miles. I expect it to be like the old VG30E in my old 87 Maxima that was the same way at over 200k miles.

 

Cool deal, I bet mine will be the same way since it was to the dealership every 3-4k like clockwork.