Thank you ianhianh wrote:Ok it worked.So yes this is your data. I threw out one flier at about 6,000 miles/qt and 10,000 miles.Yes it clearly shows steady linear improvement.So what does this mean ?I think the fact that the improvement is linear and relatively slow this is bedding in of a hard material, and I suspect the rings and or bores.I personally have never seen valve guides get better with time.We know that the spring tension on the rings is now a lot lower than it used to be, and that harder materials are used and take time to bed in i.e. Chrome / Moly rings vs cast ironhigh density spun iron liners or even steel vs cast iron bores.just my 2c...
Modified by ianh at 5:57 PM 12/28/2007
Modified by ianh at 6:00 PM 12/28/2007
Yes it seems I've started a lively post on oil consumption. Why some VQ engines use some oil & others don't is an interesting conundrum?. You will discover by reading many posts that some never check their oil & are upset & ready to sue when the engine has to be replaced. Others are going thru the oil consumption test by the dealer which to me would be would be a big pain in the butt. Others report no problem at all? My oil consumption has dropped to about 1qt per 2000 miles. Not a problem for me. My old 74 Mazda Rotory engine also used oil as it was slowly dripped into the engine by a metering pump to lubicate the engine seals. Many owners did not check their oil reqularly & destroyed those engines also. The oil consumption issue gave the rotory engine a poor reputation. However, those engines were small, light, and very powerful. I use mostly Pennzoil 5w-30 in my G with a Nissan Oil Filter and in two years of owning my G, I've had no problem. Oil is still cheap enough as I either buy it by the case or the 5 quart specials from Pep Boys. Although I have a Fram filter, I haven't used it yet as I have a supply of Nissan Filters.itgogitrev wrote:Wow, we got about 3 conversations about different things here.
I have a few questions/comments about the oil problem.
1.) Are the engines that are consuming oil within a specific era or version of the motor?
2.) Why would the manuals make a difference over the autoboxes for using oil? The only thing I could think of is if there was a problem with the engine's rear main seal.
3.)Fram filters really are crappy. I haven't seen any core material unravel, but I've seen parts of the filter core disappear without a trace.
I still have to read the rest of the thread but I wanted to say I agree 110% on this.g35cuhlean wrote:I would stop using Pennzoil if im you. That oil is not that great. I went to a auto mechanic school and all the teachers bad mouth Pennzoil. Due to Pennzoil gets all gunky inside your engine over a couple of miles.
So use something beside Pennzoil, i used to use it on most of my cars that i own, but ever sinced i heard it from most of my teachers i stopped using it too. I only listen to wise one. lol
I suggest u stop using it.
I found this but I'm too cheap to order itchampagneG35 wrote:I still have to read the rest of the thread but I wanted to say I agree 110% on this.
I know Telcoman is set in his ways though as he stated and I wont try to change that, if you've been doing something for a long time and it works for you it's hard to find a reason to change no matter what anyone says, I can understand that, same as the old man who came out of B&B Hardware and tried to tell me I was hurting my engine's performance with my cold air intake that it was no longer balanced without a filter and I kept trying to tell him and point that there was a filter but you can't see it just looking at the engine bay.
However for those with an open mind the reason for this "gunkyness" is due to the fact that Penzoil uses paraffin in it, parafin is a form of wax and if you've ever rebuilt an engine that used Penzoil on a regular basis yourself you know you can take this crap off with a putty knife! Yes I've done it with my first car when I had the engine remanufactured The guy I bought it from worked for jiffy lube so naturally he changed his oil there and they use Penzoil and it was caked. We ran a putty knife along one side of the head and had 2 inches of crud on the knife after scraping about 3 inches in length.
The really funny part is the Penzoil race car that says Penzoil all over it, yeah it uses Valvoline My stepdad is an areospace engineer & along becoming that he took an automotive mechanics engineering course in Germany (didn't just work on cars) and used to help out the pit crews here in the states at the dragstrip. Hence the way I know the Penzoil team uses Valvoline in their car.
Quaker State is another I believe that uses paraffin and should be steered clear of. All others I think are fine.
Also this may be another reason Telcoman's G is not burning as much oil as it used to. Paraffin does have it's good points, it blocks things over time. I however would not like my engine's oil consumptions fixed this way though.
my 2 cents.
Did you download the free 120 page document ?telcoman wrote:
I found this but I'm too cheap to order it
http://www.motor-oil-engineers.com/?hop=0
I just filled my tank for $45
Telcoman
I was considering getting a newer 350z/G35, but after reading this, I am a bit concerned! I would hate to get one that is just off of warranty using that much oil! It definately scares me that an engine designed not to use oil, VQ, uses more oil than my 1986 Mazda RX-7 that is designed to use oil! IIRC, it used less than a 1/2 quart every 3000 miles. Did Nissan ever explain the reason for this oil consumption?telcoman wrote:Well I just reached 40k miles on my 06 G35 Sedan. This vehicle used 1 qt of oil per 1000 mi when new. Today I checked my oil and after 1900 miles since the last oil change it took 1/2 quart. I change oil every 3k to 3.5 k miles and use Pennzoil 5w-30 oil.
Since there have been many posts on this topic I thought I would just convey my results. I had thoughts of getting rid of my vehicle after a year had the 1qt/1k mi continued. To those who feel their vehicle is using too much oil, I say be patient.
Telsoman
I had a 74 Mazda RX4 that was designed to use a small amount of oil thru a metering pump to lubricate the engine seals in the rotary engine. Unfortunately Mazda did not do a good job of informing their customers that they needed to monitor their oil level closely. It is also unfortunate that most Americans, my wife included, just think its enough to just put in gas and go and never check anything .My Infiniti service advisor and the service manager have recently informed me that the 05 thru 07 G35 are covered under the oil consumption TSB that is posted in another post for the 350ZI am about to leave for my oil consumption test & review at the dealer. With 1200 miles since my last oil change at the dealer 2 weeks ago it appears I lost a few mm of oil. I now have 48.4k miles on my Gjustjuiceit4 wrote:I was considering getting a newer 350z/G35, but after reading this, I am a bit concerned! I would hate to get one that is just off of warranty using that much oil! It definately scares me that an engine designed not to use oil, VQ, uses more oil than my 1986 Mazda RX-7 that is designed to use oil! IIRC, it used less than a 1/2 quart every 3000 miles. Did Nissan ever explain the reason for this oil consumption?