No a compression test only tests compression of each cyclinder it has no way of telling where the compression is leaking if it is low. Also if ur car runs as good as u say then compression isnt a issue here. Now if u wanted to see where a cyclinder was leaking u would use what is called a cyclinder leak down tester where u put the pistion up to top dead center with both exhaust and intake valves closed and hook up compressed air to it and it has a pressure gauge for incomming air and a percentage of escaping air and if it reads to high of escaping air then u would listen for the escaping air thru the valves dipstick hole other cyclinders etc. But thats if u had a compression issue or u could use that if u were loosing coolant threw the exhaust or help track down a cracked head with coolant escaping. The head gasket loosing oil into the combustion chambers thur the headgasket on a saturn never had that happen except on the sl1s where oil leaks out of the back of the head where the oil comes up to head from the block and that is a slow leak. With two quarts loosing every 3000 miles is that with lucas?Also I wouldnt run straight 30 oil u could run 10w40 oil.
Also my car will use two quarts of oil in 3000 miles with no leaks or alot of smoke its not uncommon the oil rings get gummed up and stick sucked up against the piston instead of away from the piston scraping the cyclinder wall. Have seen it on alot of saturn engines I have taken apart have that happen. Also the cyclinder walls get out of round.
Sunday, November 22nd, 2009 AT 12:01 PM