Originally Posted by MAMONTE

Blackrain, in answer to your questions, you can switch to Synthetic, and yes you can use it, even if your are storing your Monte. If you are not hitting 7500 miles a year in the Monte, I would at least change it once a year...

You can't beat synthetics.

I swithced our 1989 Chevy Silverado from Conventional to Synthetic at 200K. It's whole life was on conventional up to 200K...it's now homing in on 230K, and runs awesome. Just passed CA smog again too. Infact, the synthetic has noticably cleaned up the inside of the engine over time. I look though the oil fill cap with a flash light, and I CAN see a change over these last 30K on synthetic. (and those last 30K have taken 7 years to put on the truck, cause we rarely drive it now). With the truck, it never makes it to 7500 miles, we just change it once a year or so.

Now that my Monte sits for the most part, i'm probably going to just be changing it's oil about once a year too...So far i've only put 3K on the car since December.