Question about 2003 Volkswagen Jetta TDI

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How often do I need to change the synthetic oil in a 2003 jetta tdi? and what grade of oil is best?

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Change it every 10k miles. You have to use 5W40 FULL SYNTHETIC oil. Not just any oil! You can buy Shell Rotella T 5w40 or Mobil1 5w40 Turbo Diesel Truck oil at Walmart. Both of these oils meet VW's TDI oil requirements.

Posted on Jul 07, 2009

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I've been told that although the original specs for the MKIV were for 5w40 when it comes to the full synthetics 5w30 is a better viscosity

either is fine however

Posted on Nov 04, 2009

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2 Answers

Do i really need to use synthethic oil?


No, but you will see a small increase in fuel economy if you do. Plus, you can extend your oil change intervals with synthetic oil.

Dec 23, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

Which oil can be used to lubricate an turbo of a 2003 jetta tdi, can this be added in the fuel tank


PLEASE DO NOT add any oil to the fuel,use redexe/wynns diesel additive to clean the lines/injectors/turbo vanes,but burnt oil will stick to the turbo vanes and could cause failure.....just use 10/40 semi synthetic oil as normal and change regularly.also let the car tickover for a min or two after a HOT run....

Nov 02, 2010 | 2003 Volkswagen Jetta TDI

1 Answer

By changing gears while driving I've got black got smoke coming from my exchaust: what can I do to prevent it. What Oil is best for my TDI. Can I use fuel injector oil with the diesel, and can this be...


start wih #1,try using a can of redexe/wynns injector cleaner(1 can to 1/2 tank diesel)works well...#2 use 10/40 semi synthetic(best you can afford).i prefer not to use any other fuel additives(other than redexe)as VW group products are susceptical to "clogging"(dirty/high sulphur fuel dont help).i use a can of red every 25k,tailpipe dark grey......

Nov 01, 2010 | 2003 Volkswagen Jetta TDI

2 Answers

I have a 2003 Jetta TDI with 90k. Until recently I have consistently gotten 46-48 mpg. Over the past 3 months the mpg has been decreasing. The current mpg is about 30. I change the oil every 3k...


don't know about the MPG it could be a lot of things. I have a 2001 Jetta TDI. You should NEVER change the oil at 3K miles. VW recommends 10K miles for a reason. The Synthetic oil has additives to remove varnish and it does that but it needs some time to replace the varnish and properly protect sensitive engine parts. 3K is oil changes are not a good thing for a TDI......Just use the right oil and change at 10K

Oct 08, 2010 | 2003 Volkswagen Jetta TDI

2 Answers

What is the best oil to put in my rav4 2003 please?


using a high grade full synthetic is the best.
the oil grade which is 10w30 is for average driving conditions.
for winter,5w30 and 10w40 for summer is also recommended by alot of car manufacturers.The oil filler cap will tell you the oil grade.

Jan 12, 2010 | 2003 Toyota RAV4

1 Answer

What type of motor oil should I use for a 2001 jetta tdi?


There's a few that you can use - but in general

Use Full Synthetic only for the TDIs...

There's various schools of thought after that in terms of 5x 30, 5w 40, even 0w 30 or 0w40

I've been using Castrol Synthetic 5w 30. The original specs for my 2000 Jetta TDI may have been for 5w40 oil formulated for diesels - but with the Synthetics now I think the 5w30 is felt to be the best in terms of what works best in the Turbo

You can probably go every 5,000 to 7,500 miles between changes - a good thing since the synthetic oils are more expensive

by the way, some also suggest changing the fuel filter at every oil change. I'm thinking that's a bit much but others may disagree... maybe ever 15,000 miles for me


Oct 29, 2009 | 2001 Volkswagen Jetta TDI

1 Answer

What grade and how much oil is required for 3.0 L engine


5w-30 is the correct weight of oil for your vehicle. If you are currently using synthetic oil then you must stay with synthetic. If you are using regular conventional oil, then you can choose to stay with it or switch to synthetic oil. Good luck

Apr 25, 2009 | 2003 Mitsubishi Eclipse Coupe

1 Answer

How much oil for oil change 2003 Jetta TDI


I looked it up, add 4.5 quarts oil and filter

Mar 24, 2009 | 2002 Volkswagen Jetta TDI

1 Answer

I don't know if the noise from my 2003 vw tdi is normal. Are there any valve adjustments that need to be made on this engine (1.9)? My car has 160,000 miles on it. It's not too clattery, but more so upon...


There's no tappets adjustment needed for this engine as they are hydraulic lifters. Try using 10w40 instead and see what happens or otherwise try using Moreys oil treatment with your current oil as it seems to me that the noise is more at startup and for a short period. Cheers.

Mar 21, 2009 | 2003 Volkswagen Jetta TDI

2 Answers

Engine oil indicator blinking


Sounds like it could be a sludge issue which can be caused from using the incorrect oil. It is a very specific synthetic type of oil that VW suggests and when you don't use it the engine can actually 'gunk' up and cause turbo failure. (This problem happened when a non-vw dealer sold me my car with the wrong type of synthetic in it and my turbo seized) 
Google: "1.8t specific oil"

Jul 22, 2008 | 2003 Volkswagen Jetta TDI

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