I just changed my oil and oil filter on my 97 Infiniti i30. I went to Auto Zone where they told me which oil to use. I used Syntheic Oil 5w-30. Now my car isn't starting. Was I suppose to use 10w-30? Its a 6cylinder engine.
5W-30 is simply a different weight of oil it can be used at lower temperatures and such without causing problems.You can put any oil in any engine and it'll run, but a heavy oil with make you lose power and cause more engine wear. Does it turn over at all? is the battery hooked up is the battery dead? did you bump the starter wire and now it's not connecting right? oil wont stop an engine from running so there is another problem.