I'm about to do the transmission oil drain and refill and flush the radiator fluids.

at 105,000 miles I'll change out the spark plugs.

everything else is simple stuff that I can do myself.

but what about the fuel injector service ? is it just a matter of putting in one of those fuel injector cleaners in the gas tank ? any help would be appreciated.

 

Depends. IF it was my car, I'd go an get 2 bottles of Chevron Techron Fuel System Cleaner and add them to a full tank of premium fuel. Drive and record the economy numbers vs before, also note it the engine runs smoother.

If you don't notice any difference, either in fuel economy or smoothness, then the injectors were fine and you only wasted $ 12 or so. Chevron Techron is one of the highest OEM recommended fuel treatments, not just my $0.02 worth.

FYI, the dealer method for cleaning injectors is likely to be a special can of concentrate that is plugged inline to the schrader valve (tire valve like thing) on the injector rail. The fuel pump is disconnected at the fuse, and the engine is allowed to run at idle on the contents of the pressurized cleaning solution with no gas coming from the tank. The process takes about 10-15 minutes and does a nice job...with a caveat..if the injectors were in good shape before, this treatment will not make them better ~ it will only lighten your wallet by $ 150 or so.

For most cars, assuming you always use fuel from Top Tier Gasoline Brands, the injectors remain clean for a long time. If you notice gradual loss of economy and frequently buy gas at those el-cheapo stations...the $ 150 injector service might be warranted, but try the Techron additive first.

 

BBmaxi, most gas sold today already has cleaners and additives put in it. If you use a higher octane gas then you should be good. I wouldn't worry unless you notice the car missing at idle or maybe see your tach needle bouncing erratically. In that case I would suggest a bottle or 2 of Chevron injector cleaner like the other member said.