My garage have changed it at 5213 mileage, which seems very low to me? Any ideas?
Whenever it gets dirty.
Every 15,000 miles.
Should be 15 qts with filter change.
Every other oil change, drain water valve once a month.
I would say at least once every 3-4 months.
Every 4000 miles. Change it when oil is changed, along with oil filters
How often should you change the fuel filter?
no... a diesel will run a lot better on gasoline than a gasoline motor will run on diesel... If you fill it with diesel fuel you should have no problems Correct. You should not have any problems after draining tank and refilling. If you started the vehicle or tried to start the vehicle it may not be a bad idea to change the fuel filter. If you ran the vehicle on the diesel - gasoline mix until it died before you realized what happened it is possible (but not likely) to have internal damage; but at this point there is nothing you can do but drain the fuel, change filter, refuel, and see what happens.
Should be approx. 4.5L with an oil filter change. I recommend using Shell rotella 15w-40 oil. -1991 Diesel Jetta/1986 Diesel Golf/ 1985 Gas Jetta owner
Diesel, once a year or 15,000 miles. Gas, no service required. (it is part of the pump in the tank)
Gravity. Or your fuel pump is bad. There should be enough pressure from your fuel pump to push the fuel to the injectors. A clogged filter could do it also. I would change the filter first.
1) It prevents damage to injectors and engine from debris in fuel. 2) Yes. This filter should be replaced at every other oil change to prevent power loss.