I just serviced mine. Went with 30ml of 12500 and approx 10ml of 20k. Also did a coolant flush, replaced radiator cap, thermostat and distributor cap and rotor. The coolant (water) PO had put in probably had about 2% antifreeze. Took a lot longer to get up to temp and no squealing from the belts.
I also left out the rubber seal on top of the thermostat on purpose. 1) this is AZ and it will not have a problem reaching operating temp. 2) I found the old one UNDER the thermostat when I opened it up telling me that it traveled through and was probably restricting flow.
I went to Hobby Action in Chandler and got the RC Car oil. I have a theory and I wont let it die. Oil is oil, and weight is weight, if its 10k weight silicone oil it should be ok to run, if not I will do it again, but Toyota doesnt consier them serviceable, and people have had to make due with whatever they could for a long time now so might as well try whats handy
