cjfb Posted July 24, 2008 Share Posted July 24, 2008 Sorry to ask a question that’s been done to death, but after doing all the research I could I still can’t come up with a definitive answer about what type of oil I should be using. This is my first car and I’ve only had it for about a month, so I’m about as uninformed as they come. -My car is a pretty much stock R33 GTS25-t Sedan. -It’s done just over 100,000 k and the engine seems to be in pretty decent condition. -I don’t use it on tracks and rarely ever push it above 4000rpm -I’m currently using it for 30k trips to & from work 5 days a week, other than that I mostly use it for quick 5-10 minute trips. -I live in Perth, so the lowest the temp gets to here is about 1 or 2 degrees on a winter morning. I was about to go and buy some Mobil 1 5w50 but a bit more reading told me that I’m probably better off with Mobil 1 0w40 or 10w30, seeing as I don’t use it on tracks or anything. If recommended I’m willing to fork out a bit more for some Royal Purple or something, but it apparently that would be slight overkill for how I use my car. Any advice would be awesome. Thanks. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/ Share on other sites More sharing options...
Wacky Dee Posted July 24, 2008 Share Posted July 24, 2008 from what I've been told by my mechanic whome I trust (unigroup) 10W40 is the right viscosity for a R34 GTT with 64k ... which is pretty similar to your car. They reckon all the brand name fuss is a lot of nonsense and if you change the oil every 5000k it really doesn't matter which brand .. they use 'Hi-tec' which I believe is a local brand. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034101 Share on other sites More sharing options...
moobaque Posted July 24, 2008 Share Posted July 24, 2008 from what I've been told by my mechanic whome I trust (unigroup) 10W40 is the right viscosity for a R34 GTT with 64k ... which is pretty similar to your car.They reckon all the brand name fuss is a lot of nonsense and if you change the oil every 5000k it really doesn't matter which brand .. they use 'Hi-tec' which I believe is a local brand. I agree that if its for street driving (at low to mid rpm) cheap oil is an ok option as long as you are doing changes every 5k and no more! If you do ever decide you want to track it (or drive on the freeway in 2nd) don't go cheap on oil as you want something thats not going to break down at high engine temps. I would say tho try and stick with fully synthetics and a 10w40 would be a quite adequate weight for street driving although i personally go 5w50 (mobil 1 fully synthetic) But i do use it on the track...i also over fill by about 500ml to try and stop potential starvation at high rpm/fast cornering. Cheers Cam Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034164 Share on other sites More sharing options...
ZENNON Posted July 24, 2008 Share Posted July 24, 2008 motul turbolight 10w40 Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034190 Share on other sites More sharing options...
blind_elk Posted July 24, 2008 Share Posted July 24, 2008 You won't go wrong with: Brand - any name brand ie Mobil, Shell, Castrol, etc Type - Full Synthetic API rating - SJ (minimum, current is SM) SAE (Grade): First digits (for starting) - 0W, 5W, 10W / Last Digits (for running) - 40 Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034264 Share on other sites More sharing options...
LatinR33 Posted July 24, 2008 Share Posted July 24, 2008 (edited) I have been running Mobil 1 5w 50 and car loves it. Edited July 24, 2008 by LatinR33 Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034359 Share on other sites More sharing options...
(OO)SKYLINE(OO) Posted July 24, 2008 Share Posted July 24, 2008 Mobil 1 Synthetic S 10W - 40 (a semi synthetic oil, which is not too thin or too thick) as recommended by my mechanic. Car runs smooth. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034535 Share on other sites More sharing options...
charlie25T Posted July 24, 2008 Share Posted July 24, 2008 For a skyline ................Semi Synthetic is better than full synthetic.... Were are talking about motor that are 12yr +............... Unless you have a forged motor then we are talking different Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034583 Share on other sites More sharing options...
bozodos Posted July 24, 2008 Share Posted July 24, 2008 any data to back this up? I use castrol EDGE 5w30 in mine (i'd go motul if using it on the track or something like that) seems to go well, the factory spec is 7.5w30 anyway. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034599 Share on other sites More sharing options...
GtstCoupe Posted July 24, 2008 Share Posted July 24, 2008 Motul 300 chrono 10-40 FTW Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034720 Share on other sites More sharing options...
quiksta Posted July 24, 2008 Share Posted July 24, 2008 I used to use Nulon full synthetic 10w 40 in my old gts-t. I thought it was a great oil for the price, around $45. Found it better then the motul turbo light. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034808 Share on other sites More sharing options...
cjfb Posted July 24, 2008 Author Share Posted July 24, 2008 Arrg so many differring recommendations/opinions. I was sure that fully synthetic was definitely the way to go... but now i'm told semi-synthetic? As for viscosity, I'm now looking at 10w40. Is that a good choice for an RB25DET engine that's gone 100,000k? Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034921 Share on other sites More sharing options...
chrissyo Posted July 24, 2008 Share Posted July 24, 2008 5-10? Semi- full synth? will it make a HUGE difference for the average user? Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034939 Share on other sites More sharing options...
blind_elk Posted July 24, 2008 Share Posted July 24, 2008 If you still have doubts, call the Mobil LubeLine 1800 033 863 I'm assured they will give you unbiased information, even if they are part of Mobil. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4034955 Share on other sites More sharing options...
Kinks Posted July 24, 2008 Share Posted July 24, 2008 Arrg so many differring recommendations/opinions. it's simple, just use <your favourite brand here> oil. seriously, any good quality full synthetic oil will do great. the minor differences are probably all in your head, the only consistent thing i notice is that the car seems to run nicer on FRESH oil. Tried Motul, ELF, Nulon, Mobil 1 etc... the only thing better than any of these would be an oil that reverses the wear on your engine and that ain't happening! Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4035216 Share on other sites More sharing options...
subie Posted July 24, 2008 Share Posted July 24, 2008 I used to use Nulon full synthetic 10w 40 in my old gts-t. I thought it was a great oil for the price, around $45. Found it better then the motul turbo light. I agree 100% Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4035351 Share on other sites More sharing options...
buggor34 Posted July 25, 2008 Share Posted July 25, 2008 Motul Turbolight 10w40 FTW. Have used it for years in all my cars & never had a problem! Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4035779 Share on other sites More sharing options...
Big Zil Posted July 25, 2008 Share Posted July 25, 2008 I use Nulon full synthetic 10W40 in my R33 GTR. A good value oil like my bro Quiksta says. Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4036355 Share on other sites More sharing options...
nitestalkr Posted July 25, 2008 Share Posted July 25, 2008 Another +1 for Motul Turbolight 10W40.. R34GTT just over 100k Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4036419 Share on other sites More sharing options...
RusH_ Posted July 25, 2008 Share Posted July 25, 2008 i too use motul turbolight 10w40, but wondering if there is any harm/gain to be had from moving to the 5w40 full synthetic? Link to comment https://www.sau.com.au/forums/topic/229471-another-which-oil-topic/#findComment-4036507 Share on other sites More sharing options...
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