There is no noticeable loss in mileage, certainly none in coolant of using a/c at 60% capacity versu 100% capacity.
It depends on which car you have. Some just mix in hot air to make it warmer. Other's shut off the compressor after the internal temperature has reached a certain point. The second type can save you gas if you don't run the a/c at 100%.
City or highway...
Yes, if the coolant is still clean and has not been in the system for long. But if you are changing the coolant at the recommended mileage of your cars manual then it should not be reused.
The RM 250 is a motocross bike that has no odometer, therefore there is no way of keeping up with the mileage.
It obviously depends on the cars being compared but generally Diesel provides better gas mileage.
You don't have to replace it until it starts leaking coolant.
Hard start, poor fuel mileage,...
did it change for the better or worse? if it changed for the better it could of been bad.
A high mileage for the vehicle is anything over 200,000 miles. Many people are keeping their vehicles longer as long as they are running well for them.
Keeping a vehicles service history up to date and keeping a vehicles tire pressure correct, is key to getting good mileage from your vehicle. Improved driving attitude, slow acceleration and anticipating traffic conditions, to make less and unnecessary use of the brakes.
Ford trucks are usually worse than other makes when comparing gas mileage. Brands like Toyota and Mazda are better.
Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a wash Up for debate--Will lower fuel mileage, but if you take into consideration the increased wind resistance created by having windows open--probably a washYou will use more gas when your air conditioner is running.
Could be, lack of maintenance, abuse, lack of oil, lack of coolant, high mileage, exceeding speeds in any gear (abuse)