Only use 5W 30 as you say in post #16 is not what many Fully Trained and qualified VW Technicians do though.

Actually VW should be a lot clearer on Long Life Oil and those doing Low Miiles, fixed servicing, regular services for Oil & Filter changes.

 

Make the DPF / EGR issues much clearer so that owners are in no doubt over the Oil they recommend.

 

& as for spending 100 millions on developing engine longevity.

They will be paying 1000's of millions on fines & then more on 'the fix'  Buy backs in the USA likely, for cheating on EU Testing and selling 11 Million cars they knew had Defeat Devices.

Then they have enough ongoing recalls on components running their questionable software.

Average 600 Euro Profit on each car built sold, 

the Oil they buy in and fill in the engines at the factory is the VW Accountants choice.

 

The £13.50 or so per litre for VW recommended Oil charged at Main Dealers is a pith take.

People lead to believe they will void a Manufacturers warranty by not putting in Long Life Oil, 

yet changing OIl @ less than 10,000 mile intervals.

Its all good money on servicing and sometimes just lots of profits on fluids that are overpriced & over hyped.

Yes and the answer to your post is self explanatory, the word technician, not design engineer, and you still haven't provided any scientific data that can be used to validate your argument, not that I expect you could. So to play it safe let's just follow the manual, rather than gambling with some one else's engine.

I never put forward any argument, just an opinion from using lots of different oils in different engines, 

and having no trust in Castrol just because VW like to promote it.

 

My point was on the Long Life Oil, not the Spec of oils.

 

Play safe all you like, it is your money and your engine, and VW do not give any thought on it after it is out of Warranty, 

so if you run Keepers maybe think on that longevity rather than the Manufacturers Warranty Period.

 

The OP will make his own decision no doubt because he seems to be looking at the change from the Recommended

5w 30 & that does not Invalidate the Manufacturers Warranty as long as he uses the correct spec of oil.

Edited 28 March, 201610 yr by GoneOffSKi

I'm not saying your wrong, different oils may indeed be better, but as I don't have somthing that proves it, the only course of action is to play safe, defiantly when the car is in warranty, and when out of warranty deffinaly use the recommended spec. Unless there are other circumstances such as engine wear, when a thicker oil is normally used or temperature extremes for example.

so as long as i use 507.00 spec 0-40 or 5w-40 oil wouldnt do any harm ?

I doubt you'll find any.  I've only ever seen one 507.00 spec oil that wasn't 5w-30 and that was one of the Scandinavian countries... and I reckon it was a typo on the website.

 

Just to clarify, you have a diesel and it's fitted with a diesel particulate filter?  If so, you are stuck with 507.00.  If their is no DPF you can use 505.00, which has a much bigger range of viscosity to choose from.

 

If the car is used as a taxi, I wouldn't worry too much about increasing the viscosity as you aren't getting huge amounts of heat into the engine & you aren't hammering the bearings with high revs.  If you were doing track days I'd probably try and find an alternative thicker oil.

 

What I would do is think about increasing the change intervals to about 7500 miles although you might still be wasting money.  Have you ever bothered doing Used Oil Analysis?  That would be my first option - work out if you are stressing the oil too much over a normal change period.

This has me a little now actually.

 

The VW 506.1 and VW507 oils were designed for the PD injectors and the extreme pressure they put on the cam.

The 506.1 was a 0w-30 and the 507 was a 5w-30 and low ash, so as not to cause DPF issues.

 

Bearing in mind these injectors have now gone, you do have to ask why a standard spec, low ash oil of the right grade wouldn't work.

I'd be very interested in hearing why, but frankly will be using VW507 until I heard an official doc say otherwise as it's now worth the risk for so little cash.