What service is reccommended for 2004 jetta with 28,000 miles. synthetic oil changed at 25,400. miles

Hi, the reason for using synthetic oil if need a top up is because the oil in the engine is breaking down over time, and putting the same oil back to top up doesn't mix together as well as synthetic oil does, every 10k sounds about right for a VW of that age, My Golf is 08 and is the same

Use synthetic quality engine oil and factory filter and change oil every 12.000 miles.

A 5W30 will work well.

For more oil information check the site of 'The Oil Guy.'

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

Peugeot reccommend oil/filter changes at 10,000 miles or annually whichever first.and use a 10/40 semi synthetic oil.

oil/filter/lube every 3,500 miles synthetic oils every 5,000 miles
tire rotation wheel align check balance every 7500 miles
transmission service every 30,000 miles
air filter gas filter cabin air filter evry 30,000 miles
if engine has a timing belt(rubber substance) replace every 60,000 miles if it has a metal timing chain lasts almost forever
spark plugs should be good for 75,000-100,000 miles before replacing
Spark plug wires every 50,000-60,000 miles approx.
fuel injector flush every 30-40,000 miles approx.

5W 30 Synthetic Blend type of oil si the best one for your car.

sae 5/40 semi synthetic is fine,change oil every 10k/yearly regardless of service book,or service regime set on computer.engine will last longer....

Use a multiviscosity...10-30w works in all temps well. The lower the number the thinner the oil, which can work better in cold climate, and on fuel economy. If you live in a very hot area, a thicker oil can be used for better protection.
I would also reccommend a synthetic, any brand, over standard oil. It will give you much better protection with less sludge. Always change you oil @ 3,000 miles, unless you are using the extended life synthetic. Even so, check periodically to see if it is still clean after 3,000 miles. Dirty oil will tear your engine down.
An oil change is a job every car owner can do themselves. This way you can get the quality filter and oil your car deserves. The oil and filter can often be recycled at the same place you get your supplies.
The oil pick up tubes in many VWs are small. This tube has a screen on it which can get clogged with sludge and cause a loss in oil pressure.
Good Luck!

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

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.