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ugh i give up.
Magooligum, if you're going to only keep your car for 5 years, then go ahead- follow the petrol boys' advice. let the next owner deal with the engine problems when they buy it off you, as that CAN be an issue for TDI's.
cheers.
p.s. seeing as we've got a few petrol boys, who openly mock TDI's in other threads as not being ''drivers' cars'', ADVOCATING more-frequent oil changes, could they please be kind enough to post DIESEL SPECIFIC used oil analysis ''evidence'' in the context of tdi oil viscosity in certain environments, too? all this talk about how severe australian driving conditions are for DIESELS... we already have ULSD like the states and europe, which can account for up to 90% reduction in soot levels, the soot which the detergents in the oil AT REGULAR OIL CHANGE INTERVALS are MORE than capable of dispersing even on MODIFIED TDI.,
and as for heat- ''tropical temperatures'' are NOT above our tdi's- that would just go to oil viscosity, and intake work that allows for cooler intake temps would be much more advantageous than blindly changing your oil every 5,000km's just because it made sense to the petrol boys.
but from what i've read, magooligum, a VW approved 15w40 oil, changed at 10,000 MILE intervals [aka your regular service interval- 15,000 kms], will be fine, and will still allow your engine to look like new if you were to lift the head and have a look at say, 400,000km's.
Last edited by Buller_Scott; 25-06-2010 at 06:58 PM.
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Lol, DO NOT use any 15W-40 oil for a TDI unless you want problems!
Must emphasise again, you must use the correct oil, irrespective of drain interval. For your Passat, the correct standard is VW 504 00/507 00 which, if you look at the approval list, are all 5W-30 oils. Such oils include, but are not limited to;
Castrol SLX Professional Powerflow Longlife III 5W-30 : (found at VW dealers, so can be expensive per litre)
Elf Solaris LLX 5W-30
Fuchs Titan GT1 PRO C3 5W-30
Liqui-Moly Top Tec 4200 5W-30 : ($80/5L)
Mobil 1 ESP Formula 5W-30 : ($240/20L)
Motul Specific 504 00-507 00 5W-30
Penrite Enviro+ 5W-30 : ($60/5L)
Shell Helix Ultra Extra 5W-30 : ($75/5L)
Total Quartz Ineo 504-507 5W-30
Valvoline SynPower XL-III 5W-30
If you mainly drive in the city or suburbia, I'd hazard a guess you'd do less than 15k per year, in which case you should be servicing the car annually anyway. But if you travel a lot on the highways, then it's more likely you'll reach 15k within a year so that's when you'd service it. Don't worry at the rate you rake up the miles, as highway driving is gentler on the oil, and the car in general.
The only pitfalls of extended servicing are that people are less likely to open the bonnet, which doesn't make sense if you think about it. Given the duration between services, it becomes even more important that the driver makes sure all fluids are topped up - it's actually true that even a bit of new oil really does extend its age. The other problem is that if you skip just one service, that's potentially 30k on the same oil (even 504/507 oils cannot withstand that sort of punishment in Australia), so don't skip services.
If you're still contemplating more frequent drain intervals, don't go to the dealer. Much better to do it yourself, or at least learn how to (not terribly difficult if you're reasonably intelligent). Make time one weekend and use the opportunity to get to know your car better.
Further reading: TDIClub Forums - Fuels & Lubricants
Should keep you busy for a while.
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Changing the oil to often? - TDIClub Forums
This one about changing oils too often for diesels is worth wading through the 5 pages of posts to get some better understanding. Also look at the used oil analysis posts and make up your own mind.
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For those that don't understand, my comment was related to me and my experience with my car... As if it wasn't obvious!
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