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Jesus Christ! Just spent half a day reading through all 42 pages of this thread.

I have an R34 GTR and wanted to know what engine oil to use at the next service. It has been getting Mobil 1, but I know there are better ones out there for a premium which I am willing to pay for.

The odometer says 50k but I am not too sure about that - engine is mechanically sound though. It's mainly used for spirited street driving and commuting. My oil temp hardly goes over 90 deg. I am not sure whether it runs rich or not, but I do get some popping noises out the exhaust occasionally - is this mis-firing??. Mods include dump/front pipes, catback exhaust, AFC boost controller at 1.1 max boost, some cam gearing. I live in Melbourne so temp of 0-40deg year round.

I was tryiing to decide between the following:

Motul 300V Chrono 10W-40 (seems to be the most popular motul oil on SAU)

Motul 300V Power 5W-40

Motul 300V Power Racing 5W-30

All three of these have the "double ester technology".

Also on the redline site it recommends 10W-40 for GTRs. I have read redline is good but not as good as the 300V??

Also that the smaller the range the better as there are less additives. As my oil temp usually doesn't go near 100 deg, would then the 5W-30 be better than the others? I am a bit worried that it might be too light a viscosity? But if I'm running rich it should be ok??

Thanks very much for advice. Greatly appreciated.

Edited by Phatboy

wouldn't bother with a 10w from what you're describing. Don't be worried about an 0w or 5w oil

0w30 or 5w30

Redline is better than Motul

there's a group of Group 4 and 5 based oils that is mentioned a lot in this thread, and also a website where to get the best ones.

ye well i have a r33 series 2 gst....and yes its time soon for another oil and filter change.the oil you put in your car is important.and at the end of the day you get what you pay for.and guess what they never seem to throw out the good stuff on specials.like mobile1 0-40 w or motul 0-40w or the less liked catrol edge 0-40w all the good stuff in oils and about say 80 to 90 bucks for 5litres.

yes the mobil1 is good am using it now.lasts longer, i found and doesnt soot up and thin as early.i have mobile1 5-50w and will switch to the mobil1 0-40w for increased performance and fuel economy.so there you go i am even spending for a 0-40w performance iol in my r33 which will only be mainly for cruising and street use.

Also on the redline site it recommends 10W-40 for GTRs. I have read redline is good but not as good as the 300V??

Also that the smaller the range the better as there are less additives. As my oil temp usually doesn't go near 100 deg, would then the 5W-30 be better than the others? I am a bit worried that it might be too light a viscosity? But if I'm running rich it should be ok??

I believe the Redline and Motul that you've mentioned are more towards performance oils. Don't know which Redline is better than which Motul. You will need to get into the specs for each of them to compare.

Smaller the viscosity range usually has less Viscosity Modifier in it. Meaning it will hold its viscosity more percise and longer than a wider range oil.

5W30 is a bit thin if manufacturer recommends 10W40.

If price is not a concern, I will recommend running Mobil1 0W40 with good oil filter for 5000km OCI for good cold start-up protection with the turbo.

Hope this helps.

5w30 is fine for street use, especially for a R34 GTR. If there is considerable track work, you MAY think about upping it a bit...

Redline = Group 5 based oil

Motul = Group 4 based oil

(and this is in regards to the types of products we would select from these companies)

generally speaking then, Redline is better than Motul

5w30 is fine for street use, especially for a R34 GTR. If there is considerable track work, you MAY think about upping it a bit...

Redline = Group 5 based oil

Motul = Group 4 based oil

(and this is in regards to the types of products we would select from these companies)

generally speaking then, Redline is better than Motul

Correct me if I'm wrong but the Motul 300V range is a Group 5 base oil, the 8100 range is a blend of group 4 and 5.

Yeah i was pretty sure the 300V range is a group 5 oil. Personally i have never used the redline engine oils, we sell both motul and redline at work but i always use the Motuls for engine oil and redline for gearbox. What information makes you think that the top of the range redline is better then the 300V? I've had training done by the Motul reps through Link Performance and i'm pretty sure the 300V range is pretty much one of the best oils you can buy in Australia.

Thanks for everyone's advice. Yeah, looked around but didn't find any definitive info that redline engine oil >> motul 300V due to higher group oil.

Both seem good, but I think as PM-R33 said, Motul engine oils are popular as one of the best you can buy whereas redline is renowned for gearbox lubrication.

Think I will stick with the tried and true Motul 300V.... 5W-30 will do the trick I think.

I've had training done by the Motul reps through Link Performance and i'm pretty sure the 300V range is pretty much one of the best oils you can buy in Australia.

It is good to have someone who works in the industry and has contact to Motul reps.

It would be worthwhile to get some information on the blends of PAO/Easter and formulating composition on their 300V series of engine oil.

It is interesting to see how the Motul AU website has some much descriptive information on base stock oil with no numerical specs whereas ExxonMobil has little to say about base stock oil but quite detail record of numerical specs.

anyone run 10w40 Nulon fully synthetic? any feedback on this oil?

I've got R32gtst with about 130,xxxkms, what do u reckon about those viscoscity?

should i run thinner in winter?

Haven't heard anything about Nulon. It will be good to hear from someone who tried.

Viscosity should use whatever is recommended in the driver manual, it aims for average driver in average weather condition.

You should really start to consider a thicker oil only if it is starting to burn oil because of worn out internal engine parts.

Running a 5W or 0W will help with winter cold-startup.

Hope this helps.

Edited by slidetaker

What do you guys reckon I should use for my r32 gtr... Car has been rebuilt with forgies less than 25000kms ago so is still a fairly new engine. I'm thinking of using royal purple but was wondering whether i should go 5w30 or 10w40? I wanted something like 5w40??? Thought 30 might be too thin...

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