i purchased this car with about 120,000 on it car has about 150k miles...dealer has told me i need plugs and cables for car..car spits alot at times and can stall at times...car has been test driven and there appears to be a spark issue/wires maybe arcing...should i go with nissan parts for this or aftermarket...some have said the cables need to be nissan or they will fall apart?? in addition, they said possibly a couple of cylinders may have missis in them and recommended a compression check...around 100 bucks..does this seem the right price and is a compression check still the best tool for the soundness of an engine....and yes i want to keep this car which is burning about 1 quart of oil per 1000 miles...thanks