What oil is everyone using in their G35?

Post by **Jarhead767** » Sat May 05, 2007 5:09 pm

I have an 03' 6MT coupe w/ 63k miles. I am not sure what the previous owner used so I am looking for some advise. I have always used Castrol GTX 10X30 is everything I have driven for the last 24 years and never had an issue. However this is the first "performance" car I have ever owned. I noticed that most folks are using full synthetic ..... is Castrol Syntec or Syntec Blend any good for our engines?

Thanks for the input!!

Post by **yzarcur** » Sat May 05, 2007 6:23 pm

I use synthetic in my car. Either Penzol or Mobil One. It is expenseive, but it last longer and I think stronger then regular oil.

Post by **soul_hfk** » Sat May 05, 2007 8:11 pm

just had my 1st oil change today had them put mobil one in it

Post by **SVTCOBRA** » Sun May 06, 2007 2:07 am

Mobil One FULLY Syn in all of my cars.

Post by **gjim0535** » Sun May 06, 2007 1:36 pm

how often do you change the mobil one?Seems expensive to dump it every 3000.... I've been getting mine changed at the dealer since new with syn blend.... who knows what that is.....

Post by **SVTCOBRA** » Sun May 06, 2007 3:34 pm

I change mine between 3.5k and 4k miles.I change it myself.

Post by **pae9132** » Sun May 06, 2007 4:24 pm

I use royal purple in my 03 g35 auto. I've got a kinetix v+ plenum, Unorthodox pulley kit, gt grounding kit with extra ground wires, catback exhaust, headers, and a k&n intake (stillen)....since I've got these mods I choose royal purple which you can now get at Pep Boys. I alsu use a k&n gold filter to protect my engine....I change it at about 5000 miles....the oil will still be good because it's full syn but it does get build up....I've done some online research and I think 5000 is safe......

Post by **yzarcur** » Sun May 06, 2007 4:53 pm

pae9132 wrote:I ....I change it at about 5000 miles....the oil will still be good because it's full syn but it does get build up....I've done some online research and I think 5000 is safe......

That is a safe number, but a lot of factors go into this. I have heard you can go up to 7,000. on full Synthetic. If you are doing a lot of high rev. driving then I wouldn't go that high, I will go 3,500 to 4,000. just to be safe.

But normal driving you could go as high as 7,000.

Post by **SikNLow** » Mon May 07, 2007 3:12 am

I just recently did an oil change on my '03 5MT sedan and I was looking for some royal purple but opted for Red Line Synthetic instead, it has better life and according to manufacturer reccomendations as long as you swap out the oil filter and air filter at every 5k miles you can take that same oil up to 20k miles safely, and that's with high revs. Obviously we shouldn't go off of the manufacturer's longest average so I'm only taking it to about 12.5k with the regular swaps of the filters just to be on the safe side.

Post by **msmre** » Mon May 07, 2007 10:12 am

yzarcur wrote:I use synthetic in my car. Either Penzol or Mobil One. It is expenseive, but it last longer and I think stronger then regular oil.

I use the same synthetic Mobil One in my G35 Coupe.

Post by **JeromeS13** » Mon May 07, 2007 11:40 am

If you guys venture over to other G35 forums, there is a huge thread and debate about using Mobil1 now. They're synthetic is no longer a true synthetic. Again, there's a huge discussion on other forums.

As for what I use, I use Castrol Syntec 0w-30 European Formula. This, from my research and other people sending in oil samples, is what has been recommended as the best oil for the VQ35DE. The oil samples have shown that this specific oil shows less wear and tear in our engines.

-Jerome

Post by **Road Ruler** » Mon May 07, 2007 1:01 pm

Castrol Syntec 5w-30 for me and I use the car for towing a trailer. Works well, no issues.

Post by **RED_DET** » Mon May 07, 2007 2:27 pm

I use the same thing the dealer does.. penzoil 5w-30 in winter and 10w-30 in summer. I used to run mobil one synthetic in my Spec V and it burned oil every oil change. I finally had an oil consumption test done and it stopped burning oil when the dealer put conventional oil in for the test. Since I continue to use penzoil and no issues. I won't waste my money on synthetic again, just change the oil every 3000 miles with oem filter and you will be fine.

Post by **telcoman** » Tue May 08, 2007 1:40 am

I agree with you. I feel all those expensive motor oils are a waste of money. I use both 5w-30 and 10w-30 whatever is on sale at Pep Boys and change the oil every three thousand miles with an Infiniti Oil filter.

Telcoman

Post by **04G356MT** » Tue May 08, 2007 2:04 am

Mobile 1 Full Synth in every vehicle ive ever had... guess you gotta pay to play lol

Post by **ampsucker** » Wed May 09, 2007 5:40 am

i think it depends on what works well for the specific engine.

the theory behind synthetic is good. all the molecules are the same size so that improves consistency and there isn't any carbon breakdown so very little chance to make sludge.

the downside is that in some engines it will cause leakage or burning for the same reason it is a good lube - it can flow very well into tiny spaces.

i run mobil 1 full syn all the time in my 04 tundra truck with an interval of 5k. no problems and it supposedly adds tenths to my mpg rate. on my older 240, i tried it and it leaked like crazy so i switched back to castrol. the older seals and such just couldn't handle it.

so, i would say, if testing has been done and there is a general consensus on the board for a certain type of oil with a certain engine, that would be the one to go with.

theory is all well and good but in the end it's all about what works in the field. ;-)

Post by **ampsucker** » Wed May 09, 2007 5:42 am

by the way, sweet lookin' ride jerome! i like the clean look and your car's got it!

Post by **gjim0535** » Wed May 09, 2007 6:03 am

Road Ruler wrote:Castrol Syntec 5w-30 for me and I use the car for towing a trailer. Works well, no issues.

What kind of trailer do you tow with a G35??

Post by **Bocatrip** » Wed May 09, 2007 4:46 pm

In the heat of Florida, I am using Mobile 1 0W/40. I don't like using any multiviscosity 30 weight as it tends to be very watery and thin. It's pretty expensive because they don't sell it in the 5 Qt containers, but I don't do much more than 7,000 miles a year and I change my oil between 5- 6,000 miles.

Post by **tralls** » Fri May 18, 2007 12:02 pm

I have 70k miles on my sedan and have been using castrol 5-30 but just switched to Royal Purple. I hear it's great stuff. I live here in the south of Texas. No issues to date!

Post by **spankee** » Sat May 19, 2007 5:28 am

04G356MT wrote:Mobile 1 Full Synth in every vehicle ive ever had... guess you gotta pay to play lol

mobile 1 is not fully synthetic.. it still hase dino oil in it.

only redline, royal purple, castrol EURO BLEND and a couple others, are REAL SYNTHETIC.. mobile 1 is not one of them.

do a google search. mobile is just a blend of synthetics and dino base oil. not a true synthetic. if it was full synthetic then you can go 5000-7ooo miles between an oil change ...

Post by **nuctech99m** » Mon May 21, 2007 12:45 pm

I have been using Mobil 1 Full Synthetic on my 2005 G35 sedan, but now I here that it is not a full synthetic, so what should I switch to has anyone here used eneos oil it is a company from Japan now available in the U.S. I have seen it at Sport Compact Only in Phoenix

Here is their web site http://www.eneos.us/web/default.aspx

I just might start using it.

Modified by nuctech99m at 11:33 AM 5/22/2007
Modified by nuctech99m at 11:34 AM 5/22/2007

Post by **joe603** » Tue May 22, 2007 4:52 am

I use 10w40 Royal purple. Great stuff!!!

Post by **fosterelli** » Wed May 23, 2007 4:20 pm

I am a rep for a major oil company and "ampsucker" has hit the nail on the head with the attached quote...go with what works for you! But here's some backup for ampsucker...

Synthetics and standard motor oils have similarities and differences that force you to choose based on your needs. The main issue with leakage comes from the fact that a lot of seals are petroleum based. Like attracts like, so the petroleum in a standard motor oil naturally gets pulled into the petroleum based seals, causing them swell slightly. This is fine, no leaks, etc. However, when you change to a synthetic, which without going into too much depth, will pull the swollen seal closer to its original shape/diameter/size, subsequently causing leaks in some instances but not in every case...typically you will only see leaks in older or high-mileage vehicles. Newer/more modern seals are being manufactured to prevent this issue as synthetics become more and more popular so the chances of you experiencing it are getting slimmer.

On a personal note...I believe it is up to the consumer, their budget, their driving habits, and of course their maintenance concerns. I run traditional 5W30 as the owner's manual states...changing my own oil every 3K with an OEM filter...but I don't do aftermarket mods...my G is fast enough for me...I don't race the minivans or Civics, I drive mostly highway, etc...so like I said, everyone has different needs based on their situation.

ampsucker wrote:i think it depends on what works well for the specific engine.

the theory behind synthetic is good. all the molecules are the same size so that improves consistency and there isn't any carbon breakdown so very little chance to make sludge.

the downside is that in some engines it will cause leakage or burning for the same reason it is a good lube - it can flow very well into tiny spaces.

i run mobil 1 full syn all the time in my 04 tundra truck with an interval of 5k. no problems and it supposedly adds tenths to my mpg rate. on my older 240, i tried it and it leaked like crazy so i switched back to castrol. the older seals and such just couldn't handle it.

so, i would say, if testing has been done and there is a general consensus on the board for a certain type of oil with a certain engine, that would be the one to go with.

theory is all well and good but in the end it's all about what works in the field. ;-)

Post by **TwoOhThree350z** » Thu May 24, 2007 2:50 am

joe603 wrote:I use 10w40 Royal purple. Great stuff!!!

e,

how often do you change the filter to your pop charger ??

Post by **joe603** » Thu May 24, 2007 3:29 am

TwoOhThree350z wrote:e,

how often do you change the filter to your pop charger ??

Never, it's a K&N filter...I do clean it every 5-6k though.

Post by **telcoman** » Thu May 24, 2007 7:31 am

Fosterelli:

We have the same vehicle & I agree 100% with you. I too am using 5w-30 Penzoil & change oil & Infiniti filter every 3k miles. With 28k miles, I just changed the Air Filter for the second time and the cabin filter for the 1st time. The engine is now using about 1/2 qt oil every 2k miles. I filled up this morning and my mileage was 24.72 mpg using regular 87 Octane.I do not race and crusing at 80mph the tach reads 3k rpm. Best vehicle I ever owned. It sure beats my first vehicle, a 1958 Ford. What a piece of **** that car was!

Telcoman

Post by **szh** » Thu May 24, 2007 2:46 pm

Jarhead767 wrote:I have an 03' 6MT coupe w/ 63k miles. I am not sure what the previous owner used so I am looking for some advise. I have always used Castrol GTX 10X30 is everything I have driven for the last 24 years and never had an issue. However this is the first "performance" car I have ever owned. I noticed that most folks are using full synthetic ..... is Castrol Syntec or Syntec Blend any good for our engines?

Thanks for the input!!

If you change the oil and filter regularly, without fail, every time, no if's and but's about it, etc., at less than 3750 miles or 3 months, whichever comes first, then almost any engine oil of the right viscosity for your climate and temperatures will be just fine!

Having said that, the Castrol GTX 5W-30 and 10W-30 are fine dino oils to use (with the regular change interval that I mention). Other good dino oils have been listed in the past ... Chevron Supreme is another one I would consider using.

Now, if you want to treat your engine with more care, then using a synthetic is a good thing to do. I use Mobil 1 0W-40 year round and am perfectly happy with that. The fact that it is "said" (rumored? Is there some accurate site that measured this?) to not be a "pure" 100% synthetic does not matter much in the long run really. After a certain point in achieving quality, picking the "right" oil is like picking the "right" religion - the arguments are as fervent!

Z

Post by **fosterelli** » Thu May 24, 2007 6:10 pm

Amen brotha!

Post by **joe603** » Fri May 25, 2007 4:31 am

I've used royal purple for years on my 97 formula..and now the G gets it. Is it worth the extra?? Don't know, but the oil looks clean coming out, and never had a leak.

Totally agree with szhosain; it's like picking a religion! Mobil isn't my favorite company right now though...have you been to the pumps? (and the oil companies have record profits...)

What oil is everyone using in their G35?

What oil is everyone using?

Re: What oil is everyone using? (Jarhead767)

Re: What oil is everyone using? (Jarhead767)

Re: What oil is everyone using? (soul_hfk)

Re: What oil is everyone using? (SVTCOBRA)

Re: What oil is everyone using? (gjim0535)

Re: What oil is everyone using? (SVTCOBRA)

Re: What oil is everyone using? (gjim0535)

Re: What oil is everyone using? (yzarcur)

Re: What oil is everyone using? (yzarcur)

Re: What oil is everyone using? (msmre)

Re: What oil is everyone using? (JeromeS13)

Re: (RED_DET)

Re: (telcoman)

Re: (04G356MT)

Re: (ampsucker)

Re: What oil is everyone using? (Road Ruler)

Re: What oil is everyone using? (gjim0535)

Re: What oil is everyone using? (Bocatrip)

Re: (04G356MT)

Re: What oil is everyone using? (Jarhead767)

Re: (ampsucker)

Re: (joe603)

Re: (TwoOhThree350z)

Re: (fosterelli)

Re: What oil is everyone using? (Jarhead767)

Re: What oil is everyone using? (szhosain)

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