In Reply to: What oil should I use? posted by Beth and Allen on December 21, 2017 at 23:09:03:
Use the Pennzoil oil selector...
I used nothing but Pennzoil for years and years. Never had a problem.
Now I use Pennzoil, Castrol, Mobile 1, Rotella, Walmart Super Tech. And still never had a problem. Knock on wood.
We had an 06 Marquis and it was a decent car. It will need decent shocks and the little pressure switch under the middle of the motor in the front for the power steering will need to be changed because it will leak. Also the seatbelt interlock switch for the air bags will go bad. Other then that change the oil every 5k miles and you will get 20 mpg overall. We used 5w20 of whatever my shop guy used for oil...