First, your 1998 Mercury contains no Freon which is R12. It contains R-134 refrigerant. You add R134 at the low pressure port. But the fact that you need to add R134 indicates you have a leak. It is illegal to add refrigerant to a system with a leak without first repairing the leak. Seek professional help and have the leak repaired.
Was built for R12, should be converted to R134a
According to the 1997 Mercury Grand Marquis Owner Guide : ( 5W-30 ) is the PREFERRED oil
never use it
Regular Unleaded.
5W-30
can we
The EPA. They have no check or balance. Soon light bulbs will be a thing of the past, no more easy-bake oven. That's OK soon electricity prices will necessarily skyrocket.
According to the 1998 Mercury Grand Marquis Owner Guide : The engine cooling system capacity is ( 13.3 litres / 14.1 U.S. quarts ) So a 50 / 50 mix of distilled water and antifreeze would require : ( 6.65 litres / 7.05 U.S. quarts of distilled water and the same amount for the antifreeze )
Why not.If it fits, then its ok.
5 w 30
According to the 1996 Mercury Grand Marquis Owner Guide : ( 5W-30 is the PREFERRED engine oil weight )
There isn't a reset switch on a 1983 grand marquis as Ford didn't put fuel injection into cars until 1986.