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I need some advice on which oil to use for my R33 GTR.

The car is stock standard apart from the exhaust and I currently use Motul 8100 X-Cess 5w40. http://www.motul.com/nz/en/products/52

It costs $100 NZD here for 5L of X-Cess.

I was wondering if the Royal Purple HPS 10w40 http://royalpurple.com/motor-oil-hps.html would be a good alternative instead of the Motul because I could get 5L for $60 NZD rather then $100 NZD for the Motul oil.

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I've always waited till Repco do their motul 20% off and grabbed X-Cess for $65 (AUD) for 5L (I haven't done this in awhile as I've still got plenty of GW Suigi S 6000 to use up). From what I can tell about that particular RP product that it might just be a semi-synth (comparable to Motul 4100 Turbolight).. as far as I know only the RP XPR racing oil is fully synthetic (which would be comparable to X-Cess).

That being said there is absolutely nothing wrong with a good semi-synth on a street-only driven skyline, as long as it's changed every 6 months or 5000km.

Another +1 for 8100 X-Cess. Been using it for a few years now, changed to Castrol Edge when I couldnt find any 8100 around where I live but found my oil pressure was to high on cold starts, 8100 is much better :)

Im sure either will be fine.. i currently use RP

but looking for a cheaper alternative since i will be overfilling my sump to 6L, ill now need to buy another bottle

Does Motul come in 1L bottles?

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