Thats pretty low. I drive fast-- at least 80mph and average 85mph on my 60 mile commute to work. I still have a 53LMG.
Check the air pressure in the tires. If the previous owner followed the owners manual then he would have been fighting to get good MPG.
Are the tires stock size?
Check the oil and oil level. Its been shown that tech will use the wrong oil and wrong oil amounts.
Knocking... Need more info. If its a tapping sound then its the valves. Most insight owners say thay have noisy valves. Have the dealer check them.
Plugs are supposed to last 100k. Though I'd question that if the engine is in lean burn mode alot or the EGR is clogged. They cost about 20.00 a piece so go ahead and change them. The Insight doesn't have plug wires to change.
Check the air pressure in the tires. If the previous owner followed the owners manual then he would have been fighting to get good MPG.
Are the tires stock size?
Check the oil and oil level. Its been shown that tech will use the wrong oil and wrong oil amounts.
Knocking... Need more info. If its a tapping sound then its the valves. Most insight owners say thay have noisy valves. Have the dealer check them.
Plugs are supposed to last 100k. Though I'd question that if the engine is in lean burn mode alot or the EGR is clogged. They cost about 20.00 a piece so go ahead and change them. The Insight doesn't have plug wires to change.