I put synthetic oil in my 2006 Uplander, instead of the standard oil that is called for in my user manual. Until this year, I've always had the oil changed and the routine inspections, etc done when the "oil change" message went on, which is about once a year. (I only drive about 3,500 km/2,000 miles a year. This year, I'm having trouble finding an honest, competent mechanic. So I decided NOT to change the oil this year, since it looks only half-depleted. Is it important that this maintenance -- tire rotation; lubricating chassis components, and visually checking all systems -- is done on a yearly basis, or is this just a gimmick to keep GM dealers working? How often should these things be done, if the oil doesn't need replacing as often? (I've already checked all the fluids myself, and they all look fine.)

 

One of the things you might consider is to go by what your owner's manual recommends.
The manufacturer invests a lot of $$$ determining what requirements will provide best service from their product.

If you are not sure what to do , you could always ask a Service Manager at your local dealership, the advice is usually free.

 

I'm not going to the local dealer for advice. One of the reason I posted this is because I can't trust the local dealer.

Inari

 

No one trusts the local dealer here either. I have a great private shop I use if I can't fix it myself.