Which grade oil should I use for my motor?

[Monte's62]

Originally Posted by Isaiah92260

I just bought the STP injectors cleaner that the gore into the gas tank. I'm gonna use it next time I get gas. I wish I knew the history on my motor. I'm not sure if it has a lot of slide or not, but Id like to thing so because of how dirty the motor is and all the paint on the valve cover gasket has long need chipped off.

Isaiah, if you are talking about your inline 6 truck engine, you do not need to put injector cleaner in your tank. You are just wasting your money. If you can purchase 100% gas in your area, that would be a good idea.