craige

just purchased 2002 tenni, less than 2000 miles. orig. owner said oil fresh, don't know weight or specs.,now and then on hard accel.it smokes like crazy than cleans up only happens some times. level is half way between marks, fully scewed in... All so tube from fuel tank to smog canister on hooked under tank,not sure if anti spill valve is there are not, should this be plugged .What oil is best?