SkylineV35 Posted June 10, 2013 Author Share Posted June 10, 2013 Most if us should be seeing 440 to a tank, that's only 25mpg. Remember the zed has a 80 litre/17.6 gallon tank. I think imports have 60 litre tanks though. Yeah i havent managed to get mine past 60litres. Quote Link to comment Share on other sites More sharing options...
S1 HNK Posted June 10, 2013 Share Posted June 10, 2013 (edited) That's the thing that bugs me even more... The clowns running their cars on normal unleaded won't be the one's who have to pay later when the engine need a top/bottom end rebuild and new pistons. In all seriousness, we should start a sticky and add cars we know haven't been run on the proper fuel. That way potential buyers can check if they are getting a car which has been well looked after or not. Why would it be any skin off your nose what someone else runs their car on? 95 RON or 99 RON, so the car runs slightly higher compression and ideally runs more efficient on higher octane. It's not your car and probably wont make an ounce of difference to the longevity of the engine.Remember more octane doesnt give you more power and although the car is designed to run on Premium but in the case that a lower grade fuel is used it will pull ignition timing to prevent detonation. That will result in less power and less fuel economy but it won't damage it. That comment was tongue in cheek, but I think there is plenty of evidence to suggest that running a Zed on 95 RON has a detrimental effect on engine life. Mark from Abbey posted the technical reasons a while ago and also had some pics of some pistons which hadn't been happy using 95 RON. Can you image that, Nissan developing a car that blows up when using 'normal' fuel, to be proved wrong by a few guys on a forum. Of course I believe you though, I wouldn't want to start a big debate about it! I guess the US cars and Zeds in other country's where fuel is even lower than 95 RON must have been mapped differently. In fact IIRC most fuel, sorry 'Gas' stations in USA have a max of 91 RON! Why take the risk though on a performance car like a 350z? It has been proven that running lower ron fuel in the zed does indeed cause excessive engine wear so your point is totally floored. The subject does affect us as most forum owned cars tend to stay in the forum so if it comes up for sale I'd be pretty pi**ed off if I bought a car that the owner had knowingly run the car on the incorrect fuel for me to then experience engine trouble further down the line! As I'm sure you would too. Edited June 10, 2013 by S1 HNK Quote Link to comment Share on other sites More sharing options...
Dblock Posted June 10, 2013 Share Posted June 10, 2013 What if a member owned the car ran it off 99 during their 2 years of ownership sold it to you but previous owners never and the car blew up on you. Would you blame the previous owner? Quote Link to comment Share on other sites More sharing options...
S1 HNK Posted June 10, 2013 Share Posted June 10, 2013 What if a member owned the car ran it off 99 during their 2 years of ownership sold it to you but previous owners never and the car blew up on you. Would you blame the previous owner? That's missing my point, its not who I'd blame its more the fact that we all join the forum because we enjoy and respect these cars so you'd hope they'd be well looked after. If someone is knowingly putting lesser fuel in to save the pennies it doesn't help the whole cycle regardless of who's owned the car before which is often impossible to accurately know the cars history. Quote Link to comment Share on other sites More sharing options...
Dblock Posted June 10, 2013 Share Posted June 10, 2013 What if a member owned the car ran it off 99 during their 2 years of ownership sold it to you but previous owners never and the car blew up on you. Would you blame the previous owner? That's missing my point, its not who I'd blame its more the fact that we all join the forum because we enjoy and respect these cars so you'd hope they'd be well looked after. If someone is knowingly putting lesser fuel in to save the pennies it doesn't help the whole cycle regardless of who's owned the car before which is often impossible to accurately know the cars history. If someone wants to put in cheaper fuel thats their decision. I'm still sceptical on this whole super thing. How many cars have failed. 2 out of that many thousands of cars? If you buy a car with 60k and that guy ran it on 95ron then thats 60k worth of damage. No matter how much super you put in you wont reverse the damage that could already have been done. I personally use 99ron as its a jdm and its only a few more quid. But i'm not the fuel police so they can fill up with whatever. Quote Link to comment Share on other sites More sharing options...
S1 HNK Posted June 10, 2013 Share Posted June 10, 2013 (edited) It's the wrong decision, plain and simple. The manufacturer clearly states what fuel to put in the car so if people knowingly ignore this then I personally think they are fools and should drive something else Edited June 10, 2013 by S1 HNK 1 Quote Link to comment Share on other sites More sharing options...
Chris AME Posted June 10, 2013 Share Posted June 10, 2013 On the Ron ratings arnt US values so 91 does not equal 91 over here im sure I read it somewhere, and the zed does not have knock detection all the way to the redline Quote Link to comment Share on other sites More sharing options...
gsexr Posted June 10, 2013 Share Posted June 10, 2013 (edited) Had my baby about 3 months or so and never reset the fuel comp just let it work itself out and its settled on 27mpg. Dont drive it mad but give it a bootfull every now and again so all things considered i reakon thats pretty good for 3.5 litre. My use is a weekend toy though so no short trips to work and back usually runs to the coast or through sussex. V power all the way Edited June 10, 2013 by gsexr Quote Link to comment Share on other sites More sharing options...
JetSet Posted June 10, 2013 Share Posted June 10, 2013 On the Ron ratings arnt US values so 91 does not equal 91 over here im sure I read it somewhere, and the zed does not have knock detection all the way to the redline U.S Octane ratings are done in a different way to just about every other country in the world but their 91 is the same as our 95 RON fuel. In some parts of The States for example California and The Mountain States (Colorado, Wyoming,etc) you can't get anything better than 95 RON and the same goes for many rural areas in the mid west and the deep south. You can get the equivalent of 98 RON in most of the big cities and surrounding areas. I don't know if U.S Zed's use a different map, but the BHP quoted is the same as U.K cars so maybe not . Anyway, The most I've ever seen on my DTE is 402, I once filled it up to the brim (DTE 398), drove like a granny for the next 30 miles but it maxed out at 402. Pete Quote Link to comment Share on other sites More sharing options...
ir655 Posted June 10, 2013 Share Posted June 10, 2013 (edited) Interesting, so my US spec Z that I currently run on 98 octane is actually mapped for the US 91 RON rating? And its 91 in California and 93 octane elsewhere. My papers from Nissan say 214kW (287HP/371NM. I thought the EU version was 276HP? Edited June 10, 2013 by ir655 Quote Link to comment Share on other sites More sharing options...
Dblock Posted June 10, 2013 Share Posted June 10, 2013 Interesting, so my US spec Z that I currently run on 98 octane is actually mapped for the US 91 RON rating? And its 91 in California and 93 octane elsewhere. My papers from Nissan say 214kW (287HP/371NM. I thought the EU version was 276HP? Might be. But for £3-£5 a tank its not really a massive saving IMO. I'd still use super. Quote Link to comment Share on other sites More sharing options...
JetSet Posted June 11, 2013 Share Posted June 11, 2013 Interesting, so my US spec Z that I currently run on 98 octane is actually mapped for the US 91 RON rating? And its 91 in California and 93 octane elsewhere. My papers from Nissan say 214kW (287HP/371NM. I thought the EU version was 276HP? You'd have to ask about the mapping on a U.S forum. There is a way that Zed owners can get 98 RON but more of that later. The reason that 95 RON is the highest available petrol in most parts of The States is quite simple, there isn't enough demand. There is a huge demand though for low grade gasoline, anyone who's been to say Colorado or Arizona won't have failed to notice that just about everyone runs around in a pick up truck, which requires somewhere around 87-91 RON (fuel that isn't available in The U.K). You can only make so much gasoline from crude oil and making most of it low grade means there isn't much leftover to make 98 RON. Now then, you can buy high grade fuel of around 100-102 RON at a few specialised gas stations, this is considered in The States to be "Racing fuel" and is very expensive $10.50 a U.S gallon, similar to what we pay but over double what Americans pay for 95 RON. The problem with the States is its huge size and varying geography, Wyoming with it's lowest elevation of over 4,000 feet and much of it well over 6,000 feet is completely different to say Florida which is at sea level. As the air gets thinner then RON's don't need to be so high, for some cars you would in effect need a different map for different regions and what happens to cars that move around the country? Pete Quote Link to comment Share on other sites More sharing options...
spursmaddave Posted June 11, 2013 Share Posted June 11, 2013 If you are doing mostly motorway miles 95 ron would be fine surely.... Quote Link to comment Share on other sites More sharing options...
Dblock Posted June 11, 2013 Share Posted June 11, 2013 If you are doing mostly motorway miles 95 ron would be fine surely.... Probably but what if the feeling takes you I don't think its going to kill your engine straight away but 1 you will get more power from super, 2 its going to keep everything cleaner 3 you might have a higher average mpg. Not enough to offset the cost but enough to make it worth it over standard. Quote Link to comment Share on other sites More sharing options...
Terence Bower Posted June 11, 2013 Share Posted June 11, 2013 Filled up with Super at Nurburg,drove the car properly,ie,85/90 all the way back to Ely cambs,used the car for a few short journeys before having to refill it,around 579 to the fill up. Quote Link to comment Share on other sites More sharing options...
370Ad Posted June 11, 2013 Share Posted June 11, 2013 (edited) USA (AKI/PON) = Europe (RON) Regular........... 87 = 91 Plus................ 89 = 93 Premium......... 91 = 95 Premium Plus... 93 = 98 Edited June 11, 2013 by 350Ad Quote Link to comment Share on other sites More sharing options...
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