rowey200 Posted May 3, 2016 Share Posted May 3, 2016 (edited) Folks, I'm just about to carry out the first service of my 350z ('04 DE) in my ownership. I read that the recommended oil is a 5w -30, however, it appears that my car (which is a one previous owner car with full Nissan service history) has been run on 10w -40 (see sticker stuck in handbook). Just wondering if there is any reason for this? For the first few years of its life the car was doing around 20k miles per year, and although this reduced later in its life, it has done more miles than most (just about to tick onto 120k miles). Should I stick with the 10w -40 or go with 5w -30 (Fuchs Titan or similar)? Thanks in advance Edited May 3, 2016 by rowey200 Quote Link to comment Share on other sites More sharing options...
KyleR Posted May 3, 2016 Share Posted May 3, 2016 Personally I'd use 5w-30, that's what's recommended. 1 Quote Link to comment Share on other sites More sharing options...
Rook Posted May 3, 2016 Share Posted May 3, 2016 Indeed, and in fact I'd be even more likely to use that for if it were doing lots of mileage, because of economy. Most people who use more viscous oils are chasing performance or are boosted. Quote Link to comment Share on other sites More sharing options...
veilside z Posted May 4, 2016 Share Posted May 4, 2016 (edited) As above buddy 5/30 a much thinner oil suits the engine well. Use a half decent brand in it though . Edited May 4, 2016 by veilside z Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2016 Share Posted May 4, 2016 I would stick to 5W40 for the simple reason that its been run on that grade, and it now has higher mileage, if you revert to 5w30 it will likely result in lower oil pressure. Quote Link to comment Share on other sites More sharing options...
Richf Posted May 4, 2016 Share Posted May 4, 2016 (edited) Many Nissan dealers use 10w40 because thats what most cars take It should be 5w30 but 5w40 is fine also Edited May 4, 2016 by Richf@H-Dev Quote Link to comment Share on other sites More sharing options...
rowey200 Posted May 4, 2016 Author Share Posted May 4, 2016 Thanks for the replies Will go for a 5w30 as that's what it should be running. You would have thought that Nissan main dealers would use the spec of oil that Nissan stipulates in the owners manual (or would you, haha)?! Thanks again......lets get this baby serviced Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted May 4, 2016 Share Posted May 4, 2016 I would stick to 5W40 for the simple reason that its been run on that grade, and it now has higher mileage, if you revert to 5w30 it will likely result in lower oil pressure. What he has said ^^^^^ Quote Link to comment Share on other sites More sharing options...
rowey200 Posted May 4, 2016 Author Share Posted May 4, 2016 (edited) Would this 5w40 tick the box as a good option? http://www.ebay.co.u...-sAAOxy5jxSakFs Would I be correct in thinking the 5w (as opposed to 10w) will give better start up protection as the oil will be thinner, but that the 40 (as opposed to 30) will mean that the oil stays slightly thicker when hot (keeping oil pressure more stable / allowing for the higher mileage engine)? Sorry for all the questions Edited May 4, 2016 by rowey200 Quote Link to comment Share on other sites More sharing options...
NazMan Posted May 4, 2016 Share Posted May 4, 2016 Would this 5w40 tick the box as a good option? http://www.ebay.co.u...-sAAOxy5jxSakFs Would I be correct in thinking the 5w (as opposed to 10w) will give better start up protection as the oil will be thinner, but that the 40 (as opposed to 30) will mean that the oil stays slightly thicker when hot (keeping oil pressure more stable / allowing for the higher mileage engine)? Sorry for all the questions This is a much better value alternative, mate. http://www.opieoils.co.uk/p-68976-shell-helix-ultra-5w-40-fully-synthetic-engine-oil-recommended-by-ferrari.aspx Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 4, 2016 Share Posted May 4, 2016 Would this 5w40 tick the box as a good option? http://www.ebay.co.u...-sAAOxy5jxSakFs Would I be correct in thinking the 5w (as opposed to 10w) will give better start up protection as the oil will be thinner, but that the 40 (as opposed to 30) will mean that the oil stays slightly thicker when hot (keeping oil pressure more stable / allowing for the higher mileage engine)? Sorry for all the questions Cold viscosity will make very little difference in our climate, so 5w or 10w will be fine, 40 will be slightly more viscous than 30 at normal running temp, so is better suited to a high mileage or hard used engine. Quote Link to comment Share on other sites More sharing options...
rowey200 Posted May 5, 2016 Author Share Posted May 5, 2016 Would this 5w40 tick the box as a good option? http://www.ebay.co.u...-sAAOxy5jxSakFs Would I be correct in thinking the 5w (as opposed to 10w) will give better start up protection as the oil will be thinner, but that the 40 (as opposed to 30) will mean that the oil stays slightly thicker when hot (keeping oil pressure more stable / allowing for the higher mileage engine)? Sorry for all the questions Cold viscosity will make very little difference in our climate, so 5w or 10w will be fine, 40 will be slightly more viscous than 30 at normal running temp, so is better suited to a high mileage or hard used engine. Cheers Quote Link to comment Share on other sites More sharing options...
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