115K - Original Owner. 2000 - V8 Auto SR5. Tow Package. Light off road and towing. Mostly easy/light on acceleration and usually drive under 2000 RPM.
I was draining 4 qts every other oil change (3K-4K miles) and replacing with Castrol Dextron III but it became too hard to find, so at about 40K I switched to the Chevron Dextron III stuff for sale at Costco.
When I start the engine cold in the morning the ATF level is on the bottom notch of the cold section on the dip stick. When it is hot it is on the bottom notch of the hot section.
Everything looks and smells good and I have had no transmission problems so far.
I used to get up to 20 mpg, but lately it seems to stay around 17 mpg. I just changed the plugs and airfilter, but was wondering if a drop in mpg is a sign of transmission problems not to far down the road?
Thank you
