Lawsy Wanabe mechanical engineer Donating Members 960 Member For: 20y 2m 12d Gender: Male Location: At the computer, obviously..... Posted 28/05/08 07:20 AM Share Posted 28/05/08 07:20 AM (edited) I think you'll find that the FPV approval on the 0W-40 is for the V8's.Mate, you are 100% right, I just now checked the Castrol website to confirm this. And this makes perfect sense as well; the 5.4 is highly strung, and the tolerances are as tight as FPV could manage...Well done Ad's, you just made this a whole lot easier. Also, the Edge 10w-60 is the only 10w fully synthetic oil that Castrol has, keep that in mind when deciding. I think I know what is going on with this edge stuff now...It would have to just have a low enough friction to bring the strain on the oil pump down to equivalent 50 grade levels, and being a fully synthetic it must have a low enough high shear viscosity as well. This would then qualify the use of a 60 grade oil, but only if it is able to perform like a lower grade oil under stress, while still maintaining the benefit of the higher film strength... (insert epiphany face).See what I mean though? These oil engineers, bloody rocket scientists! Edited 28/05/08 07:31 AM by Lawsy Link to comment Share on other sites More sharing options...
SILK RSPEC Donating Members 193 Member For: 17y 29d Gender: Male Location: Brisbane Southside Posted 28/05/08 07:22 AM Share Posted 28/05/08 07:22 AM exactly fpv recommends in there book"Boss 290: Recommended Castrol Edge Synthetic SAE viscosity grade 0W-40""F6 270 Turbo: Recommendation Mineral SAE viscosity grade 15W-40"I don't understand doesn't a turbo car rely on a lot better oil to stop breakdown of detergents when running through a turbo.I am sure FORD is on drugs when they wrote this. Link to comment Share on other sites More sharing options...
Lawsy Wanabe mechanical engineer Donating Members 960 Member For: 20y 2m 12d Gender: Male Location: At the computer, obviously..... Posted 28/05/08 07:50 AM Share Posted 28/05/08 07:50 AM (edited) Shear breaks an oil and its viscosity index modifiers, oxidation and impurities from the combustion process reduce the effect of the detergent package. The turbo itself does neither of these things on an oil when compared with the stress an oil feels within the engine itself.What it does do, though, is create a lot of heat. This is where having a 40 or 50 grade oil vs a 30 (for the NA) becomes critical.[EDIT] I guess I can throw another spanner in the works. If you run an oil cooler, you would want to select an oil based on the fact that your oil is going to be cooler, and therefor thicker at running temp. Hmmm... Edited 28/05/08 07:53 AM by Lawsy Link to comment Share on other sites More sharing options...
jbute Member 95 Member For: 17y 9m 10d Location: NSW Posted 28/05/08 11:42 AM Share Posted 28/05/08 11:42 AM (edited) R35 GTR Skyline V6 Twin Turbo, Porsche Turbo all models they recommend Mobil 0W-40 if it is good enough for hundred thousand dollar cars & recommended by their engineers then I'm sure an XR6T motor want break it down. Plus it is recommenced for the XR6T. Edited 28/05/08 11:43 AM by jbute Link to comment Share on other sites More sharing options...
heiny33 Member 13 Member For: 16y 6m 1d Gender: Male Location: perth Posted 28/05/08 01:20 PM Share Posted 28/05/08 01:20 PM What oils do you guys use on your turbos?I've been recommended synthetic so that's what I use,I know an enthusiast who runs a sick ba t with 450 kilowatts at the front wheel and he swears by synthetic. Link to comment Share on other sites More sharing options...
seventytwo Still have a turbo, it's just on a diesel. Lifetime Members 5,368 Member For: 19y 4m 22d Gender: Male Location: The 8th Dimension Posted 28/05/08 01:22 PM Share Posted 28/05/08 01:22 PM Try herehttp://www.fordxr6turbo.com/forum/index.php?showtopic=44773 Link to comment Share on other sites More sharing options...
dule Donating Members 1,180 Member For: 17y 7m 13d Gender: Male Location: Sydney Posted 28/05/08 01:35 PM Share Posted 28/05/08 01:35 PM It's all about the best oil suitable for the engine, that's why we have so many different types of viscosity, and not just few different quality levels. I really wouldn't be comparing a ford 4L engine to Porsche turbo or R35 GTR. Remember this is a taxi motor with a turbo bolted on to it.There is a reason some manufacturers recommend thicker oils, if thinner was always better they would all recommend it for all cars. Link to comment Share on other sites More sharing options...
Lawsy Wanabe mechanical engineer Donating Members 960 Member For: 20y 2m 12d Gender: Male Location: At the computer, obviously..... Posted 28/05/08 02:34 PM Share Posted 28/05/08 02:34 PM (edited) It's all about the best oil suitable for the engine, that's why we have so many different types of viscosity, and not just few different quality levels. I really wouldn't be comparing a ford 4L engine to Porsche turbo or R35 GTR. Remember this is a taxi motor with a turbo bolted on to it.There is a reason some manufacturers recommend thicker oils, if thinner was always better they would all recommend it for all cars.Exactly, and no one here has said that the 0w-40 was a bad oil (your post seems to indicate that I was attacking that particular oil, when I wasn't). I certainly haven't said it was bad, I also know it isn't the best, but it most definately is not the worst, not by a long shot... It's just that (like I've said many times now) in our climate a 0w grade oil is not required, since in our climate the situation in which a 0w grade oil can show its benefit never eventuates (which is at sub zero temperatures). So why does the GT need it? Well a 5w-40 would probably have sufficed, but in the end, the castrol oil obviously has some property, some detergent or friction coefficient that made the engine run to their liking. It does not actually mean that the 5.4 needs the 0w rating, which is because 0w oils are specifically designed for sub zero temperature operation with a viscosity as close to a 5w oil as possible. Does this mean that the 0w-40 is the best oil on the market? Definately not! Is it good? Yes! Should you use it in your XR6T? No, since it is not actually recommended for this motor, by all but one oil company, Mobil 1, and this is because they have a hole in their product range. Does this make mobil 1 bad? Definately not! They simply lack the exact viscosity rating to suit this motor. But, again, since in our climate the oil generaly wont be anywhere near sub zero temperatures, the oils properties tend to converge closer to what is recommended anyway, therefore they can recommend it, but this does not mean that it is the best choice for your vehicle, and they know it! Infact, this is possibly the only case where I wouldn't buy mobil 1, if money wasn't an issue, because I know that the most important thing about an oil is its viscosity. If it isn't in the sweet spot, then it isn't in the sweet spot, no matter how good the other properties are (this is where I think a lot of people get confused, they sacrifice the right viscosity for an apparent property that they aren't even sure exists).Oils is just a really confusing topic, that's all, with so many little loopholes and variables that you have to dig deep to find the right answer, and then dig even deeper in order to explain why there seems to be so many contradictions. If we dig deeper again and make some educated judgement calls, we then find out that there really weren't any, but each seemingly odd recommendation has a plausable explanation that holds true to the real world experiences most people have had.I've been trying to puzzle out oils for nearly a year now, and I feel like I'm still only scratching the surface... Edited 28/05/08 02:36 PM by Lawsy Link to comment Share on other sites More sharing options...
jbute Member 95 Member For: 17y 9m 10d Location: NSW Posted 29/05/08 05:34 AM Share Posted 29/05/08 05:34 AM Defiantly not attacking your post or what your have to say as this is how we find out information Lawsy. So sorry if you have taken it that way.But you just proved my point with your last post. Mobil One 0W-40 Well Exceeds all Ford grading for engine oil, A lot of people use Nylon which does not meet all of Fords gradings. 0W-40 can act as everything between 5W,10W,15W it has a lot wide range.Nissan, Porsche ect. must have planned on eskimos buying there vechiles. Link to comment Share on other sites More sharing options...
Kimberley Scott www.australianflag.org.au Donating Members 6,763 Member For: 19y 4m 12d Gender: Male Location: Brisbane Posted 29/05/08 05:44 AM Share Posted 29/05/08 05:44 AM Vegetable oild from the supermarket, you can fry chips in it so surely it can ahndle the heat of a Turbo. Much much cheaper as well.Scotty Link to comment Share on other sites More sharing options...
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