My newly aquired 1995 GSR came with an AEM CAI and an Apex'i N1 Exhaust. The car, at purchase, was burning a quart of oil every 3-4 days! Since that time, I have replaced the exhaust and fixed a leaving CV joint. No other work has been done. The car is no longer burning oil, after 2 weeks without adding any, the dipstick reads normal. Would the exhaust cause the car to burn more oil? Should I be concerned? Should I have compression and leakdown tests done? Cars that suddenly stop having problems worry me more than cars that start having problems!