It's a big engine, it's bound to use a lot of gas.
On a 2000 Mercury Sable : The automatic transaxle ( transmission ) fluid level dipstick would be near the firewall just to the drivers side of the engine ( where the transaxle is bolted to the engine )
The 1995 Mercury Sable would have come from the factory with ( 5W-30 ) oil in the engines
According to the 2003 Mercury Sable owners manual : It depends on which engine you have The 3.0 liter " Vulcan " V6 engine and it's flex fuel version take the Motorcraft FL-400-S engine oil filter so the answer would be YES ------------------------------------------------------------------------------------------------ The 3.0 liter DOHC " Duratec " engine takes the Motorcraft FL-820-S engine oil filter so the answer would be NO
The check engine light would illuminate and set a code for the bad O2 sensor.
You must scan the computer to find out the code first Go to a qualified mechanic for a diagnostic
Probably , there would be a fuse box in the passenger compartment and a Power Distribution Box ( which is " live " ) located in the engine compartment
The starter is located at the front of the engine (front of the car). Look at the engine from underneath, just behind the radiator - follow the heavy gauge black wire to the starter itself.
Could be a bad inertia switch.
how much would it cost on a 2004 mercury sable
That engine uses a timing chain. Chances are very slim that the chain jumped time. However if it did jump time the engine would not run and the engine would have no compression. Tell us what the symptoms are.
The blinking means there is a condition that is causing damage to the converter. The cause would need to be troubleshooted.
Replace your transmission pump or get a new transmission.