Cartridge RHF4H VIDZ 8973311850 Isuzu Various 4JB1TC

Is there a separate oil system for the turbo?
Except for very unusual cases, no. The turbo will use the engine oil for its lubrication and cooling needs.

Do turbos have specific oil requirements?
Yes, good quality oil is essential. You do not need to use specific 'turbo grade' oil, however good quality is a must.

How often do I need to change the oil?
Every 5000 kms on a petrol engine. Leaving oil changes for too much longer can spell death to a turbo.

Are there any problems with fitting a high performance air filter?
Yes. To ensure a good lifespan of your turbo it is very important that your air filter properly removes small particles from the intake air. With compressor blades spinning at over 100000 RPM small debris passing through the turbo will make a very effective job of sand blasting the compressor blades. While cone filters and mesh inserts (such as K&N) are fine to use on a turbo vehicle, it is very important that they are regularly cleaned and oiled – without oil their filtering abilities are severely reduced. Please see the Turbo Damage Guide for more details.

Can I turn my engine off right away, or do I need to idle for a while after the turbo has been used?
Hot shutdowns cause extensive deposits of carbon and shellac on the turbine end. As the deposits break up and flow into the oil they score and wear the bearing bore, bearing and shaft journal. This problem is pretty much self-explanatory and you should all know how to avoid it. Always allow your vehicles to cool down prior to shutting them off. DON'T rely on water-cooled bearing housings and synthetic oil to prevent this from happening to you.