dot 4 normally has a 230 degree boiling point, 5.1 has the 260 degree, but i suspect there are certain other aspect of the fluid you have there which dont meet 5.1 specs & thus they called it 4+ :L. as for if its any good then only way to find out is to bang it in the car & see.
6 speed transverse transaxle in 3 shaft architecture. Installation length 332/322 mm with 106,2/98,25 mm bell housing depth. Weight (without oil) - approx. 45.5 kg. Oil fill - 1.7 liters. All gears synchronized. Reverse idler gear is speedgear 1st gear. Two piece housing. Cable shift system top mounted.
The coolant when cold should be between the min and max level.When at working temperature the coolant level can be at the maximum level due to expansion.If you are topping up to the max when cold maybe you are overfilling,just a thought.I've owned my MK1 for five years and haven't needed to do a top up.Maybe I m lucky.
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ford focus mk1 oil capacity